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Finding the Fourth Proportional to 463.88, 640.36 and 353.36

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Solution

The fourth proportional to 463.88, 640.36 and 353.36 is: 487.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.88 : 640.36 = 353.36 : x
  2. Step 2: Convert to fraction form
    463.88/640.36 = 353.36/x
  3. Step 3: Cross multiply
    463.88x = 640.36 × 353.36
  4. Step 4: Simplify right side
    463.88x = 226,277.61
  5. Step 5: Solve for x
    x = 226,277.61/463.88
  6. Step 6: Final answer
    x = 487.79

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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.