Proportion/Not Proportion

Tell whether each pair of ratios forms a proportion.

1:2 as to 2:4

• Yes

• Not sure

• Sometimes

• No

Answer explanation

The pair of ratios 1:2 and 2:4 form a proportion because they are equivalent ratios (1/2 = 2/4). Therefore, the correct answer is 'Yes'.

Tell whether each pair of ratios forms a proportion.

7:9 and 9:3

• Yes

• Not sure

• Sometimes

• No

Answer explanation

The pair of ratios 7:9 and 9:3 do not form a proportion because the cross products are not equal (7*3 is not equal to 9*9). Therefore, the correct answer is No.

• Yes

• Not sure

• Sometimes

• No

Answer explanation

The pair of ratios do not form a proportion because the cross products are not equal (10*9 is not equal to 3*50). Therefore, the correct answer is No.

Tell whether each pair of ratios forms a proportion.

3:4 as to 6:8

• Yes

• Not sure

• Sometimes

• No

Answer explanation

The pair of ratios 3:4 and 6:8 form a proportion because they are equivalent when simplified to 3/4 = 6/8 = 0.75.

Tell whether each pair of ratios forms a proportion.

4:6 as to 8:12

• Yes

• Not sure

• Sometimes

• No

Answer explanation

The pair of ratios 4:6 and 8:12 form a proportion because they are equivalent ratios when simplified to 2:3.

• No

• Sometimes

• Maybe

• Yes

Answer explanation

The pair of ratios does not form a proportion because 5/8 is not equal to 1/2.