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Finding the Fourth Proportional to 227.57, 341.32 and 81.30

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Solution

The fourth proportional to 227.57, 341.32 and 81.30 is: 121.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.57 : 341.32 = 81.30 : x
  2. Step 2: Convert to fraction form
    227.57/341.32 = 81.30/x
  3. Step 3: Cross multiply
    227.57x = 341.32 × 81.30
  4. Step 4: Simplify right side
    227.57x = 27,749.32
  5. Step 5: Solve for x
    x = 27,749.32/227.57
  6. Step 6: Final answer
    x = 121.94

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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.