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Finding the Third Proportional to 312,418 and 672,302

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Solution

The third proportional to 312,418 and 672,302 is: 1,446,747.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,418 : 672,302 = 672,302 : x
  2. Step 2: Convert to fraction form
    312,418/672,302 = 672,302/x
  3. Step 3: Cross multiply
    312,418x = 672,302 × 672,302
  4. Step 4: Simplify right side
    312,418x = 451,989,979,204
  5. Step 5: Solve for x
    x = 451,989,979,204/312,418
  6. Step 6: Final answer
    x = 1,446,747.56

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.