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Finding the Fourth Proportional to 381.52, 572.28 and 92.95

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Solution

The fourth proportional to 381.52, 572.28 and 92.95 is: 139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.52 : 572.28 = 92.95 : x
  2. Step 2: Convert to fraction form
    381.52/572.28 = 92.95/x
  3. Step 3: Cross multiply
    381.52x = 572.28 × 92.95
  4. Step 4: Simplify right side
    381.52x = 53,194.87
  5. Step 5: Solve for x
    x = 53,194.87/381.52
  6. Step 6: Final answer
    x = 139.43

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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.