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Finding the Third Proportional to 3,979 and 5,462

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Solution

The third proportional to 3,979 and 5,462 is: 7,497.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979 : 5,462 = 5,462 : x
  2. Step 2: Convert to fraction form
    3,979/5,462 = 5,462/x
  3. Step 3: Cross multiply
    3,979x = 5,462 × 5,462
  4. Step 4: Simplify right side
    3,979x = 29,833,444
  5. Step 5: Solve for x
    x = 29,833,444/3,979
  6. Step 6: Final answer
    x = 7,497.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.