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Finding the Third Proportional to 3,960 and 5,329

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Solution

The third proportional to 3,960 and 5,329 is: 7,171.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960 : 5,329 = 5,329 : x
  2. Step 2: Convert to fraction form
    3,960/5,329 = 5,329/x
  3. Step 3: Cross multiply
    3,960x = 5,329 × 5,329
  4. Step 4: Simplify right side
    3,960x = 28,398,241
  5. Step 5: Solve for x
    x = 28,398,241/3,960
  6. Step 6: Final answer
    x = 7,171.27

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.