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Finding the Third Proportional to 867 and 1,542

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Solution

The third proportional to 867 and 1,542 is: 2,742.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    867 : 1,542 = 1,542 : x
  2. Step 2: Convert to fraction form
    867/1,542 = 1,542/x
  3. Step 3: Cross multiply
    867x = 1,542 × 1,542
  4. Step 4: Simplify right side
    867x = 2,377,764
  5. Step 5: Solve for x
    x = 2,377,764/867
  6. Step 6: Final answer
    x = 2,742.52

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.