Question

1) Which two ratios form a proportion?

A) 1: 3 and 6: 3
B) 1: 3 and 3:6
C) 3: 1 and 9: 3
D) 3: 1 and 3:9

Answer 1

Option C is correct.

• Proportion means two ratios are equal to each other.

Option A Option B

1 : 3 and 6 : 3 1 : 3 and 3 : 6

1 : 3 and 2 : 1 1 : 3 and 1 : 2

not proportional not proportional

Option C Option D

3 : 1 and 9 : 3 3 : 1 and 3 : 9

3 : 1 and 3 : 1 3 : 1 and 1 : 3

proportional not proportional