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Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation
7.15 Ratios and Proportions

Ratios Facts:
  • A ratio is a comparison.
  • The units must be the same.
  • They are written as a fraction or with a colon.

  • A proportion is two ratios set equal.
  • They may be direct or inverse.
  • They are solved by cross-multiplication.

  • Q 1: If 3 gallons of milk cost $6, how many bottles can you buy for $24?

    Q 2: Two children weighing 30 and 40 pounds balance a teeter totter(seesaw). How many feet from the fulcrum must the heavier boy sit if the lighter boy is 8 feet from the fulcrum?

    Q 3: A team won 25 games in a 40-game season. Find the ratio of games won to games lost.

    Q 4: If 4 planes can carry 800 passengers, how many planes are needed to carry 1600 passengers?

    Q 5: If 30 people construct a structure in 4 days. How long will it take for 40 people to construct the same structure?
    4 days
    5 days
    3 days

    Q 6: If 4 men can do a job in 10 days. How many days does it take 2 men to do the same job? (Hint: Inverse proportion)
    20 days
    10 days
    5 days

    Q 7: Jan's car uses 35 gallons of gas to drive 250 miles. At this rate approximately how many gallons of gas will she need for a trip of 800 miles.

    Q 8: At 'a' cents per can, what is the cost of 'b' cases of soda if there are 15 cans in a case?

    Question 9: This question is available to subscribers only!

    Question 10: This question is available to subscribers only!

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