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Finding the Fourth Proportional to 503.28, 754.91 and 138.06

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Solution

The fourth proportional to 503.28, 754.91 and 138.06 is: 207.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.28 : 754.91 = 138.06 : x
  2. Step 2: Convert to fraction form
    503.28/754.91 = 138.06/x
  3. Step 3: Cross multiply
    503.28x = 754.91 × 138.06
  4. Step 4: Simplify right side
    503.28x = 104,224.07
  5. Step 5: Solve for x
    x = 104,224.07/503.28
  6. Step 6: Final answer
    x = 207.09

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