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Finding the Fourth Proportional to 658.90, 908.92 and 472

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Solution

The fourth proportional to 658.90, 908.92 and 472 is: 651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.90 : 908.92 = 472 : x
  2. Step 2: Convert to fraction form
    658.90/908.92 = 472/x
  3. Step 3: Cross multiply
    658.90x = 908.92 × 472
  4. Step 4: Simplify right side
    658.90x = 429,010.24
  5. Step 5: Solve for x
    x = 429,010.24/658.90
  6. Step 6: Final answer
    x = 651.10

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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.