Ratio and Proportion Word Problems - Math

The Organic Chemistry Tutor2 minutes read

To find the ratio of cats to dogs on an island with 540 cats and 675 dogs, set up a fraction with cats on top and dogs on the bottom. In a class with a ratio of boys to girls as 8 to 7 and 40 boys, use a proportion to find that there are 35 girls in the class.

Insights

  • The process of determining ratios involves setting up fractions with the given quantities and then simplifying them by dividing to find the relationship between different elements.
  • Proportions play a significant role in solving problems related to ratios, allowing for the calculation of missing values based on the established relationships between the quantities involved.

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Recent questions

  • How can I find the ratio of cats to dogs?

    Set up a fraction with cats on top and dogs on the bottom, then simplify.

  • How do I calculate the number of girls in a class with a given ratio of boys to girls?

    Use a proportion with the number of boys given to find the number of girls.

  • How can I determine the number of cakes Karen can make in a given time frame?

    Set up a proportion using the number of cakes she can make in a known time period.

  • How can I find the width of a large rectangle given the length and a proportion?

    Set up a proportion using the lengths of the small and large rectangles.

  • How can I calculate the number of nickels in a jar with a given ratio of coins?

    Multiply the ratio of nickels by the total number of coins.

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Summary

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"Ratio Calculations for Cats, Dogs, and More"

  • To find the ratio of cats to dogs on an island with 540 cats and 675 dogs, set up a fraction with cats on top and dogs on the bottom.
  • Simplify the fraction by dividing both numbers by 5, then by 9, resulting in a ratio of 4 to 5 or 4:5.
  • In a class with a ratio of boys to girls as 8 to 7 and 40 boys, use a proportion to find that there are 35 girls in the class.
  • To determine how many cakes Karen can make in 15 hours if she can make 14 cakes in 6 hours, set up a proportion and find that she can make 35 cakes in 15 hours.
  • When the length and width of a small rectangle are 9 inches and 8 inches, and the length of a large rectangle is 24 inches, set up a proportion to find the width of the large rectangle as 64/3 inches or approximately 21.3 inches.
  • In a jar with a ratio of nickels, dimes, and quarters as 3 to 4 to 7 and a total of 112 coins, calculate that there are 24 nickels in the jar.
  • By multiplying the ratios of nickels, dimes, quarters, and the total by 8, find that there are 24 nickels, 32 dimes, and 56 quarters in the jar, totaling 112 coins.
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