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Finding the Third Proportional to 3,917 and 7,379

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Solution

The third proportional to 3,917 and 7,379 is: 13,900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917 : 7,379 = 7,379 : x
  2. Step 2: Convert to fraction form
    3,917/7,379 = 7,379/x
  3. Step 3: Cross multiply
    3,917x = 7,379 × 7,379
  4. Step 4: Simplify right side
    3,917x = 54,449,641
  5. Step 5: Solve for x
    x = 54,449,641/3,917
  6. Step 6: Final answer
    x = 13,900.85

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.