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Finding the Fourth Proportional to 463.20, 638.88 and 347.04

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Solution

The fourth proportional to 463.20, 638.88 and 347.04 is: 478.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.20 : 638.88 = 347.04 : x
  2. Step 2: Convert to fraction form
    463.20/638.88 = 347.04/x
  3. Step 3: Cross multiply
    463.20x = 638.88 × 347.04
  4. Step 4: Simplify right side
    463.20x = 221,716.92
  5. Step 5: Solve for x
    x = 221,716.92/463.20
  6. Step 6: Final answer
    x = 478.66

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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.