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Finding the Fourth Proportional to 658.32, 908.38 and 392.84

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Solution

The fourth proportional to 658.32, 908.38 and 392.84 is: 542.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.32 : 908.38 = 392.84 : x
  2. Step 2: Convert to fraction form
    658.32/908.38 = 392.84/x
  3. Step 3: Cross multiply
    658.32x = 908.38 × 392.84
  4. Step 4: Simplify right side
    658.32x = 356,848.00
  5. Step 5: Solve for x
    x = 356,848.00/658.32
  6. Step 6: Final answer
    x = 542.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.