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Finding the Fourth Proportional to 463.92, 640.06 and 353.55

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Solution

The fourth proportional to 463.92, 640.06 and 353.55 is: 487.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.92 : 640.06 = 353.55 : x
  2. Step 2: Convert to fraction form
    463.92/640.06 = 353.55/x
  3. Step 3: Cross multiply
    463.92x = 640.06 × 353.55
  4. Step 4: Simplify right side
    463.92x = 226,293.21
  5. Step 5: Solve for x
    x = 226,293.21/463.92
  6. Step 6: Final answer
    x = 487.78

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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.