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Finding the Third Proportional to 921.80 and 1,819.13

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Solution

The third proportional to 921.80 and 1,819.13 is: 3,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.80 : 1,819.13 = 1,819.13 : x
  2. Step 2: Convert to fraction form
    921.80/1,819.13 = 1,819.13/x
  3. Step 3: Cross multiply
    921.80x = 1,819.13 × 1,819.13
  4. Step 4: Simplify right side
    921.80x = 3,309,215.77
  5. Step 5: Solve for x
    x = 3,309,215.77/921.80
  6. Step 6: Final answer
    x = 3,589.96

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.