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Finding the Third Proportional to 1,331 and 2,782

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Solution

The third proportional to 1,331 and 2,782 is: 5,814.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331 : 2,782 = 2,782 : x
  2. Step 2: Convert to fraction form
    1,331/2,782 = 2,782/x
  3. Step 3: Cross multiply
    1,331x = 2,782 × 2,782
  4. Step 4: Simplify right side
    1,331x = 7,739,524
  5. Step 5: Solve for x
    x = 7,739,524/1,331
  6. Step 6: Final answer
    x = 5,814.82

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.