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Finding the Fourth Proportional to 633.76, 874.50 and 385.18

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Solution

The fourth proportional to 633.76, 874.50 and 385.18 is: 531.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.76 : 874.50 = 385.18 : x
  2. Step 2: Convert to fraction form
    633.76/874.50 = 385.18/x
  3. Step 3: Cross multiply
    633.76x = 874.50 × 385.18
  4. Step 4: Simplify right side
    633.76x = 336,839.91
  5. Step 5: Solve for x
    x = 336,839.91/633.76
  6. Step 6: Final answer
    x = 531.49

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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.