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Finding the Third Proportional to 169.31 and 355.92

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Solution

The third proportional to 169.31 and 355.92 is: 748.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.31 : 355.92 = 355.92 : x
  2. Step 2: Convert to fraction form
    169.31/355.92 = 355.92/x
  3. Step 3: Cross multiply
    169.31x = 355.92 × 355.92
  4. Step 4: Simplify right side
    169.31x = 126,680.38
  5. Step 5: Solve for x
    x = 126,680.38/169.31
  6. Step 6: Final answer
    x = 748.20

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.