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Finding the Fourth Proportional to 462.72, 694.20 and 138.08

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Solution

The fourth proportional to 462.72, 694.20 and 138.08 is: 207.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.72 : 694.20 = 138.08 : x
  2. Step 2: Convert to fraction form
    462.72/694.20 = 138.08/x
  3. Step 3: Cross multiply
    462.72x = 694.20 × 138.08
  4. Step 4: Simplify right side
    462.72x = 95,855.14
  5. Step 5: Solve for x
    x = 95,855.14/462.72
  6. Step 6: Final answer
    x = 207.16

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