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Finding the Fourth Proportional to 633.95, 874.92 and 385.28

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Solution

The fourth proportional to 633.95, 874.92 and 385.28 is: 531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.95 : 874.92 = 385.28 : x
  2. Step 2: Convert to fraction form
    633.95/874.92 = 385.28/x
  3. Step 3: Cross multiply
    633.95x = 874.92 × 385.28
  4. Step 4: Simplify right side
    633.95x = 337,084.80
  5. Step 5: Solve for x
    x = 337,084.80/633.95
  6. Step 6: Final answer
    x = 531.73

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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.