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Finding the Third Proportional to 819.28 and 1,323.84

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Solution

The third proportional to 819.28 and 1,323.84 is: 2,139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.28 : 1,323.84 = 1,323.84 : x
  2. Step 2: Convert to fraction form
    819.28/1,323.84 = 1,323.84/x
  3. Step 3: Cross multiply
    819.28x = 1,323.84 × 1,323.84
  4. Step 4: Simplify right side
    819.28x = 1,752,562.27
  5. Step 5: Solve for x
    x = 1,752,562.27/819.28
  6. Step 6: Final answer
    x = 2,139.15

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.