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Finding the Fourth Proportional to 634.53, 875.43 and 385.86

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Solution

The fourth proportional to 634.53, 875.43 and 385.86 is: 532.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.53 : 875.43 = 385.86 : x
  2. Step 2: Convert to fraction form
    634.53/875.43 = 385.86/x
  3. Step 3: Cross multiply
    634.53x = 875.43 × 385.86
  4. Step 4: Simplify right side
    634.53x = 337,793.42
  5. Step 5: Solve for x
    x = 337,793.42/634.53
  6. Step 6: Final answer
    x = 532.35

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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.