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Finding the Fourth Proportional to 634.37, 875.22 and 385.61

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Solution

The fourth proportional to 634.37, 875.22 and 385.61 is: 532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.37 : 875.22 = 385.61 : x
  2. Step 2: Convert to fraction form
    634.37/875.22 = 385.61/x
  3. Step 3: Cross multiply
    634.37x = 875.22 × 385.61
  4. Step 4: Simplify right side
    634.37x = 337,493.58
  5. Step 5: Solve for x
    x = 337,493.58/634.37
  6. Step 6: Final answer
    x = 532.01

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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.