Proportions

The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in the class?

• 12 girls

• 15 girls

• 5.3 girls

• 27 girls

Sara can type 90 words in 4 minutes. About how many words would you expect her to type in 10 minutes at this rate?

• 900 words

• 180 words

• 225 words

• 360 words

Two slices of Dan’s Famous Pizza have 230
Calories. How many Calories would you expect to be in 5 slices of the same pizza?

• 2.5 calories

• 575 calories

• 250 calories

• 460 calories

The distance that an automobile travels varies directly as the time it travels. If the car travels 280 miles in 7 hours, how far will it travel in 12 hours?

• 480

• 1960

• 84

• 25

21 out of 24 student will pass the next math test. How many students will pass if 72 students take it?

• 63

• 82.2

• 1512

• 1728

Doug earned $76 for 8 hours of work. Patty worked 11 1/2 hours and earned $109.25. Does this represent a proportional relationship?

• No

• Yes

Proportions are two ____________ ratios

If Mike scored 120 points in 4 games and continues to score at this same rate, how many points would he score after 15 games?

• 32

• 30

• 450

• 275

Solve the proportion for the missing variable. In your answer, do not use x = \frac{50.4}{7.2}=\frac{x}{4.6}