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Finding the Third Proportional to 81.28 and 175.50

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Solution

The third proportional to 81.28 and 175.50 is: 378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.28 : 175.50 = 175.50 : x
  2. Step 2: Convert to fraction form
    81.28/175.50 = 175.50/x
  3. Step 3: Cross multiply
    81.28x = 175.50 × 175.50
  4. Step 4: Simplify right side
    81.28x = 30,800.25
  5. Step 5: Solve for x
    x = 30,800.25/81.28
  6. Step 6: Final answer
    x = 378.93

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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.