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Finding the Fourth Proportional to 458.62, 687.85 and 133.90

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Solution

The fourth proportional to 458.62, 687.85 and 133.90 is: 200.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.62 : 687.85 = 133.90 : x
  2. Step 2: Convert to fraction form
    458.62/687.85 = 133.90/x
  3. Step 3: Cross multiply
    458.62x = 687.85 × 133.90
  4. Step 4: Simplify right side
    458.62x = 92,103.12
  5. Step 5: Solve for x
    x = 92,103.12/458.62
  6. Step 6: Final answer
    x = 200.83

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