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Finding the Third Proportional to 861 and 1,554

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Solution

The third proportional to 861 and 1,554 is: 2,804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    861 : 1,554 = 1,554 : x
  2. Step 2: Convert to fraction form
    861/1,554 = 1,554/x
  3. Step 3: Cross multiply
    861x = 1,554 × 1,554
  4. Step 4: Simplify right side
    861x = 2,414,916
  5. Step 5: Solve for x
    x = 2,414,916/861
  6. Step 6: Final answer
    x = 2,804.78

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.