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Finding the Third Proportional to 3,999 and 6,387

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Solution

The third proportional to 3,999 and 6,387 is: 10,200.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999 : 6,387 = 6,387 : x
  2. Step 2: Convert to fraction form
    3,999/6,387 = 6,387/x
  3. Step 3: Cross multiply
    3,999x = 6,387 × 6,387
  4. Step 4: Simplify right side
    3,999x = 40,793,769
  5. Step 5: Solve for x
    x = 40,793,769/3,999
  6. Step 6: Final answer
    x = 10,200.99

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.