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Finding the Fourth Proportional to 633.82, 951.78 and 391.88

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Solution

The fourth proportional to 633.82, 951.78 and 391.88 is: 588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.82 : 951.78 = 391.88 : x
  2. Step 2: Convert to fraction form
    633.82/951.78 = 391.88/x
  3. Step 3: Cross multiply
    633.82x = 951.78 × 391.88
  4. Step 4: Simplify right side
    633.82x = 372,981.59
  5. Step 5: Solve for x
    x = 372,981.59/633.82
  6. Step 6: Final answer
    x = 588.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.