Name
7-1
Class
Date
Practice
Form K
Ratios and Proportions
Write the ratio of the first measurement to the second measurement.
1. length of car: 14 ft 10 in.
2. weight of car: 2900 lb
length of model car: 8 in.
3. diameter of car tire: 40 cm
weight of model car: 8 oz
4. height of car: 4 ft 8 in.
diameter of toy car tire: 18 mm
height of toy car: 3 in.
5. There are 238 juniors at a high school. The ratio of girls to boys in the junior class is 3:4.
How many juniors are girls? How many are boys?
6.The sides of a rectangle are in the ratio 2:5. The perimeter of the rectangle is 70
cm. What is the width of the rectangle?
7.The measures of the angles of a triangle are in the extended ratio 6 : 1 : 5. What is
the measure of the largest angle?
Algebra Solve each proportion. To start, use the Cross Products Property.
8.
3 x

5 25
9.
x 9

4 2
10.
x2 3

8
4
11.
y y6

3
8
Coordinate Geometry Use the graph. Write each ratio in
simplest form.
16.
AC

AD
17.
AB
=
EC
; simplified to
.
18. slope of ED =
19. You are helping to hang balloons in the gym for a school dance. There are a total of 175 balloons. Some
of the balloons are gold and the rest are silver. If the ratio of gold to silver is 3 : 2, how many gold
balloons are there?
20. The ratio of the width to the height of a window is 2 : 7. The width of the window is 3 ft. Write and
solve a proportion to find the height.
21. The sides of a triangle are in the extended ratio of 3 : 4 : 10. If the length of the shortest side is 9 in.,
what is the perimeter of the triangle?
22. Write a proportion that has means 4 and 15 and extremes 6 and 10.
Algebra Solve each proportion.
23.
x 77

4 28
24.
3
9

4 y 138
25.
6
3

d  5 d 1
26
8
6

2y  3 y  4