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Finding the Fourth Proportional to 227.52, 341.28 and 81.28

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Solution

The fourth proportional to 227.52, 341.28 and 81.28 is: 121.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.52 : 341.28 = 81.28 : x
  2. Step 2: Convert to fraction form
    227.52/341.28 = 81.28/x
  3. Step 3: Cross multiply
    227.52x = 341.28 × 81.28
  4. Step 4: Simplify right side
    227.52x = 27,737.53
  5. Step 5: Solve for x
    x = 27,737.53/227.52
  6. Step 6: Final answer
    x = 121.91

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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.