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Finding the Third Proportional to 1,272 and 3,339

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Solution

The third proportional to 1,272 and 3,339 is: 8,764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272 : 3,339 = 3,339 : x
  2. Step 2: Convert to fraction form
    1,272/3,339 = 3,339/x
  3. Step 3: Cross multiply
    1,272x = 3,339 × 3,339
  4. Step 4: Simplify right side
    1,272x = 11,148,921
  5. Step 5: Solve for x
    x = 11,148,921/1,272
  6. Step 6: Final answer
    x = 8,764.88

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.