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Finding the Fourth Proportional to 925.39, 1,387.92 and 275.97

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Solution

The fourth proportional to 925.39, 1,387.92 and 275.97 is: 413.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.39 : 1,387.92 = 275.97 : x
  2. Step 2: Convert to fraction form
    925.39/1,387.92 = 275.97/x
  3. Step 3: Cross multiply
    925.39x = 1,387.92 × 275.97
  4. Step 4: Simplify right side
    925.39x = 383,024.28
  5. Step 5: Solve for x
    x = 383,024.28/925.39
  6. Step 6: Final answer
    x = 413.91

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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.