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Finding the Fourth Proportional to 463.45, 639.12 and 358.76

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Solution

The fourth proportional to 463.45, 639.12 and 358.76 is: 494.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.45 : 639.12 = 358.76 : x
  2. Step 2: Convert to fraction form
    463.45/639.12 = 358.76/x
  3. Step 3: Cross multiply
    463.45x = 639.12 × 358.76
  4. Step 4: Simplify right side
    463.45x = 229,290.61
  5. Step 5: Solve for x
    x = 229,290.61/463.45
  6. Step 6: Final answer
    x = 494.75

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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.