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Finding the Fourth Proportional to 633.62, 951.29 and 438.15

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Solution

The fourth proportional to 633.62, 951.29 and 438.15 is: 657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.62 : 951.29 = 438.15 : x
  2. Step 2: Convert to fraction form
    633.62/951.29 = 438.15/x
  3. Step 3: Cross multiply
    633.62x = 951.29 × 438.15
  4. Step 4: Simplify right side
    633.62x = 416,805.52
  5. Step 5: Solve for x
    x = 416,805.52/633.62
  6. Step 6: Final answer
    x = 657.82

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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.