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      Question

      If 'R' is the prime number 3, then find the fourth

      proportion of (R + 2), (R - 1) and (R + 7).
      A 5 Correct Answer Incorrect Answer
      B 4 Correct Answer Incorrect Answer
      C 3 Correct Answer Incorrect Answer
      D 6 Correct Answer Incorrect Answer

      Solution

      'R' = 3

      So, the numbers are 5, 2 and 10.

      Let fourth proportion be 'm'.

      So, 5m = 2 Γ— 10

      Or, 5m = 20

      Or, 'm' = 4

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