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Finding the Fourth Proportional to 227.70, 341.69 and 81.49

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Solution

The fourth proportional to 227.70, 341.69 and 81.49 is: 122.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.70 : 341.69 = 81.49 : x
  2. Step 2: Convert to fraction form
    227.70/341.69 = 81.49/x
  3. Step 3: Cross multiply
    227.70x = 341.69 × 81.49
  4. Step 4: Simplify right side
    227.70x = 27,844.32
  5. Step 5: Solve for x
    x = 27,844.32/227.70
  6. Step 6: Final answer
    x = 122.29

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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.