Proportions

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve.

• 4

• 1

• 16

• 2

Solve the proportion:

• 3

• 4

• 9

• 6

Cross Multiply/Cross Products

• 15

• 420

• 28

• 16

Hamburger meat sells for $6 for every 3 pounds. If Alicia buys 10 pounds of hamburger meat, how much will she pay?

• $30

• $20

• $60

• $10

Write a proportion to find how many points a student needs to score on a test in order to get the given percent:
The test is worth 12 points.
The test score is 75%.

• p/12=100/75

• p/100=12/75

• p/12=75/100

• p/75=12/100

Write a proportion to find how many points a student needs to score on a test in order to get the given percent:
The test is worth 60 points.
The test score is 50%.

• p/100=50/60

• p/50=60/100

• p/60=100/50

• p/60=50/100

Solve for x

• x = 19.6

• x = 5/98

• x = 101/5

Solve for x 

• x = 6

• x = 25

• x = 28

• x = 17

The movie theater has 250 seats. 225 seats were sold for the current showing. What percent of seats are sold?

• 10%

• 20%

• 80%

• 90%