FRAME NUMBER 4
LEVEL A
1
A ratio of
(1:4) is verbally expressed an one to four.
4
4
Then a ratio of (4:1) is verbally expressed as
1
PROPORTION
FRAME NUMBER 17
LEVEL B
If the ratio of two numbers equals the ratio of two other numbers, the four numbers form a
proportion. Example: 2 = 4
1=2
3
6
2
4
What number should represent the letter (X) to form a proportion of the following equation? Refer to
FRAME NUMBER if you have trouble.
a. 3
=X
b. 4
=8
c. 6
=X
5
10
5
X
9
3
FRAME NUMBER 30
LEVEL C
Type 2. The scale of a map is 1:35,000. What is the ground distance if the distance on the map
is 1.8 inches? Express in feet. We say, 1 is to 35,000 as map distance (1.8 inches) is to ground distance
(unknown). We write
1
=
1.8 .
35,000
X
Complete the solution: 35,000 x 1.8
=
12
9
Previous Page
