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Finding the Third Proportional to 238.75 and 517.56

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Solution

The third proportional to 238.75 and 517.56 is: 1,121.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.75 : 517.56 = 517.56 : x
  2. Step 2: Convert to fraction form
    238.75/517.56 = 517.56/x
  3. Step 3: Cross multiply
    238.75x = 517.56 × 517.56
  4. Step 4: Simplify right side
    238.75x = 267,870.94
  5. Step 5: Solve for x
    x = 267,870.94/238.75
  6. Step 6: Final answer
    x = 1,121.97

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.