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      Question

      What is the fourth proportional to 189, 273 and 153?

      A 117 Correct Answer Incorrect Answer
      B 299 Correct Answer Incorrect Answer
      C 221 Correct Answer Incorrect Answer
      D 187 Correct Answer Incorrect Answer

      Solution

      189:273::153:x 189x=273*153 x=273*153/189 x=221

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