If $4, x, 9$ are in continued proportion, $x$ equals

If $4, x, 9$ are in continued proportion, $x$ equals
  1. $6$
  2. $13$
  3. $\dfrac{13}{2}$
  4. $36$

Solution

$x^{2} = 4 \times 9 = 36 \Rightarrow x = 6$.

Asked in: MH-SSC-9

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