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Finding the Third Proportional to 819.84 and 1,279.13

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Solution

The third proportional to 819.84 and 1,279.13 is: 1,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.84 : 1,279.13 = 1,279.13 : x
  2. Step 2: Convert to fraction form
    819.84/1,279.13 = 1,279.13/x
  3. Step 3: Cross multiply
    819.84x = 1,279.13 × 1,279.13
  4. Step 4: Simplify right side
    819.84x = 1,636,160.77
  5. Step 5: Solve for x
    x = 1,636,160.77/819.84
  6. Step 6: Final answer
    x = 1,995.70

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.