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Finding the Third Proportional to 81.46 and 175.92

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Solution

The third proportional to 81.46 and 175.92 is: 379.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.46 : 175.92 = 175.92 : x
  2. Step 2: Convert to fraction form
    81.46/175.92 = 175.92/x
  3. Step 3: Cross multiply
    81.46x = 175.92 × 175.92
  4. Step 4: Simplify right side
    81.46x = 30,948.51
  5. Step 5: Solve for x
    x = 30,948.51/81.46
  6. Step 6: Final answer
    x = 379.94

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.