7.4D Proportions (WGU and Converting) Knowledge Check

1. A quality inspector inspects a random box of 50 tablets. 

He discovers 2 are defective.

In an order of 2,000 tablets, how many are likely to be defective?

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7.4.D

1. Mark averaged 185 miles in 5 hours on his trip to Austin last week. 

At this rate, how many miles can he travel in 2.5 hours?

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7.4.D

1. Hallie lost 1.44 kilograms after a week of exercise. 

If 1 kilogram is approximately 2.2 pounds, approximately how many pounds did Hallie lose?

Round your answer to the nearest hundredth.

• 0.65 lb

• 1.53 lb

• 3.17 lb

• 3.64 lb

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7.4.E

1. The ratio of girls to boys is 4:7.

If Mrs. Armstrong’s class contains 16 girls, how many boys are there in the class?

• 27 boys

• 30 boys

• 36 boys

• 28 boys

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7.4.D

1. Jonas wants to mail a package that weighs 8.5 kilograms. 

How much does the package weigh in pounds? 

(1 kg is approximately 2.2 pounds)

• 10.7 lbs

• 8.24 lbs

• 3.9 lbs

•  18.7 lbs

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7.4.D

1. At a car race, Billy’s favorite car completed 5 laps in 12 minutes. If the car completes 7 laps, how many minutes will it take the car?

Round your answer to the nearest whole number (minute).

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7.4.D

1. A recipe for dessert requires 3 cups of strawberries for every 1 ½ cups of yogurt used. 

At this rate, how much yogurt should be used if 2 cups of strawberries are used?

• 1 cup

• 9 cups

• ¾ cups

• ½ cups

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7.4.D

1. At a concession stand 6 hot dogs cost $6.72. 

At this rate, how much would 8 hot dogs cost, in dollars and cents?

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7.4.D