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Finding the Third Proportional to 280,713 and 431,481

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Solution

The third proportional to 280,713 and 431,481 is: 663,224.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,713 : 431,481 = 431,481 : x
  2. Step 2: Convert to fraction form
    280,713/431,481 = 431,481/x
  3. Step 3: Cross multiply
    280,713x = 431,481 × 431,481
  4. Step 4: Simplify right side
    280,713x = 186,175,853,361
  5. Step 5: Solve for x
    x = 186,175,853,361/280,713
  6. Step 6: Final answer
    x = 663,224.91

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.