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Finding the Third Proportional to 151.31 and 163.97

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Solution

The third proportional to 151.31 and 163.97 is: 177.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.31 : 163.97 = 163.97 : x
  2. Step 2: Convert to fraction form
    151.31/163.97 = 163.97/x
  3. Step 3: Cross multiply
    151.31x = 163.97 × 163.97
  4. Step 4: Simplify right side
    151.31x = 26,885.75
  5. Step 5: Solve for x
    x = 26,885.75/151.31
  6. Step 6: Final answer
    x = 177.68

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.