The ratio between the fourth proportional of 7, 5, and 3 to the third proportional of 7 and 13 is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 15 : 169.
Calculations:
The fourth proportion of 7, 5 and 3
= 5 × 3/7 = 15/7
The third proportional of 7 and 13 = 13 × 13/7 = 169/7
Hence, the required ratio = 15/169 = 15 : 169