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Finding the Third Proportional to 3,279 and 3,615

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Solution

The third proportional to 3,279 and 3,615 is: 3,985.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279 : 3,615 = 3,615 : x
  2. Step 2: Convert to fraction form
    3,279/3,615 = 3,615/x
  3. Step 3: Cross multiply
    3,279x = 3,615 × 3,615
  4. Step 4: Simplify right side
    3,279x = 13,068,225
  5. Step 5: Solve for x
    x = 13,068,225/3,279
  6. Step 6: Final answer
    x = 3,985.43

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.