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Railways PYQCBT 1 2016

RRB NTPC · Question 98

Find the 4^th proportional to 9, 17 and 27.

  1. 57

  2. 48

  3. 51

  4. 53

Show answer & explanation

Answer: (C) 51

Explanation

The fourth proportional x satisfies 9 : 17 = 27 : x. So x = 17 × 27/9 = 17 × 3 = 51.