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Finding the Fourth Proportional to 925.27, 1,387.91 and 275.96

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Solution

The fourth proportional to 925.27, 1,387.91 and 275.96 is: 413.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.27 : 1,387.91 = 275.96 : x
  2. Step 2: Convert to fraction form
    925.27/1,387.91 = 275.96/x
  3. Step 3: Cross multiply
    925.27x = 1,387.91 × 275.96
  4. Step 4: Simplify right side
    925.27x = 383,011.80
  5. Step 5: Solve for x
    x = 383,011.80/925.27
  6. Step 6: Final answer
    x = 413.95

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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.