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Finding the Fourth Proportional to 624.90, 937.61 and 381.43

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Solution

The fourth proportional to 624.90, 937.61 and 381.43 is: 572.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.90 : 937.61 = 381.43 : x
  2. Step 2: Convert to fraction form
    624.90/937.61 = 381.43/x
  3. Step 3: Cross multiply
    624.90x = 937.61 × 381.43
  4. Step 4: Simplify right side
    624.90x = 357,637.52
  5. Step 5: Solve for x
    x = 357,637.52/624.90
  6. Step 6: Final answer
    x = 572.31

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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.