Find the ratio between the fourth proportional of 42, 56, 63 and the fourth proportional of 189, 273, and 153.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 84 : 221.
Fourth proportional of 42, 56, and 63 = (56 × 63)/42 = 84
Fourth proportional of 189, 273, and 153 = (273 × 153)/189 = 221
Required ratio = 84 : 221