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Finding the Fourth Proportional to 627.30, 939.99 and 432.41

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Solution

The fourth proportional to 627.30, 939.99 and 432.41 is: 647.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.30 : 939.99 = 432.41 : x
  2. Step 2: Convert to fraction form
    627.30/939.99 = 432.41/x
  3. Step 3: Cross multiply
    627.30x = 939.99 × 432.41
  4. Step 4: Simplify right side
    627.30x = 406,456.38
  5. Step 5: Solve for x
    x = 406,456.38/627.30
  6. Step 6: Final answer
    x = 647.95

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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.