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Finding the Fourth Proportional to 658.59, 908.17 and 396.55

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Solution

The fourth proportional to 658.59, 908.17 and 396.55 is: 546.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.59 : 908.17 = 396.55 : x
  2. Step 2: Convert to fraction form
    658.59/908.17 = 396.55/x
  3. Step 3: Cross multiply
    658.59x = 908.17 × 396.55
  4. Step 4: Simplify right side
    658.59x = 360,134.81
  5. Step 5: Solve for x
    x = 360,134.81/658.59
  6. Step 6: Final answer
    x = 546.83

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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.