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Finding the Third Proportional to 81.28 and 175.03

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Solution

The third proportional to 81.28 and 175.03 is: 376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.28 : 175.03 = 175.03 : x
  2. Step 2: Convert to fraction form
    81.28/175.03 = 175.03/x
  3. Step 3: Cross multiply
    81.28x = 175.03 × 175.03
  4. Step 4: Simplify right side
    81.28x = 30,635.94
  5. Step 5: Solve for x
    x = 30,635.94/81.28
  6. Step 6: Final answer
    x = 376.91

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.