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Finding the Fourth Proportional to 658.24, 908.50 and 392.74

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Solution

The fourth proportional to 658.24, 908.50 and 392.74 is: 542.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.24 : 908.50 = 392.74 : x
  2. Step 2: Convert to fraction form
    658.24/908.50 = 392.74/x
  3. Step 3: Cross multiply
    658.24x = 908.50 × 392.74
  4. Step 4: Simplify right side
    658.24x = 356,804.29
  5. Step 5: Solve for x
    x = 356,804.29/658.24
  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.