Proportions

Simple Proportions

100

1/x=9/27

x=3

200

DOUBLE POINTS: 2/x=6/15

x=5

300

x/10 = 6/20

x=3

400

1/4=5/x

x=20

500

4/5 = x/35

x=28

Bigger Number Proportions

100

18/x=108/150

x=25

200

5/12=x/96

x=40

300

5/8 = 30/x

x=48

400

4/5=x/45

x=36

500

4/8=28/x

x=56

Proportions Mix

100

x/2=10/20

x=1

200

3/5=x/15

x=9

300

DOUBLE POINTS: 29/9=x/60

x=193.33

400

x/12.3=8/19

x=5.17

500

It takes Mike 18 minutes to finish reading 4 pages of a book. How long does it take for him to finish reading 30 pages?

135 mins

Proportions with Decimals

100

KEEP ONLY TWO DIGITS AFTER THE DECIMAL: 3.8/x=5.4/3

x=2.11

200

KEEP ONLY TWO DIGITS AFTER THE DECIMAL: 1.7/21=8/x

x=98.82

300

KEEP ONLY TWO DIGITS AFTER THE DECIMAL: 6/23=x/7.7

x=2.00

400

KEEP ONLY TWO DIGITS AFTER THE DECIMAL: x/12=3.2/26

x=1.47

500

DOUBLE POINTS: KEEP ONLY TWO DIGITS AFTER THE DECIMAL: x/2=107/3.15

x=67.93

Word Problems

100

A car travels 120 miles in 3 hours (with a constant speed). How long will it take to travel 200 miles?

5 hours

200

50 apples cost $25. How much would 75 apples cost?

= $37.50

300

Nathan packs 25 boxes in 2 hours. How many boxes can he pack in his 8-hour shift?

100 boxes

400

13 candy bars weigh 26 ounces. What is the weight of 35 candy bars?

70 ounces

500

DOUBLE POINTS: A machine can produce 6 yards of fabric in 2 minutes. How much fabric can the machine produce in 1 hour?

180 yds