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Finding the Third Proportional to 412,859 and 581,380

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Solution

The third proportional to 412,859 and 581,380 is: 818,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,859 : 581,380 = 581,380 : x
  2. Step 2: Convert to fraction form
    412,859/581,380 = 581,380/x
  3. Step 3: Cross multiply
    412,859x = 581,380 × 581,380
  4. Step 4: Simplify right side
    412,859x = 338,002,704,400
  5. Step 5: Solve for x
    x = 338,002,704,400/412,859
  6. Step 6: Final answer
    x = 818,687.99

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.