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Finding the Third Proportional to 381,990 and 809,514

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Solution

The third proportional to 381,990 and 809,514 is: 1,715,523.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,990 : 809,514 = 809,514 : x
  2. Step 2: Convert to fraction form
    381,990/809,514 = 809,514/x
  3. Step 3: Cross multiply
    381,990x = 809,514 × 809,514
  4. Step 4: Simplify right side
    381,990x = 655,312,916,196
  5. Step 5: Solve for x
    x = 655,312,916,196/381,990
  6. Step 6: Final answer
    x = 1,715,523.75

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.