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Finding the Fourth Proportional to 381.38, 572.08 and 92.82

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Solution

The fourth proportional to 381.38, 572.08 and 92.82 is: 139.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.38 : 572.08 = 92.82 : x
  2. Step 2: Convert to fraction form
    381.38/572.08 = 92.82/x
  3. Step 3: Cross multiply
    381.38x = 572.08 × 92.82
  4. Step 4: Simplify right side
    381.38x = 53,100.00
  5. Step 5: Solve for x
    x = 53,100.00/381.38
  6. Step 6: Final answer
    x = 139.23

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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.