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Finding the Third Proportional to 311,687 and 672,579

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Solution

The third proportional to 311,687 and 672,579 is: 1,451,335.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,687 : 672,579 = 672,579 : x
  2. Step 2: Convert to fraction form
    311,687/672,579 = 672,579/x
  3. Step 3: Cross multiply
    311,687x = 672,579 × 672,579
  4. Step 4: Simplify right side
    311,687x = 452,362,511,241
  5. Step 5: Solve for x
    x = 452,362,511,241/311,687
  6. Step 6: Final answer
    x = 1,451,335.83

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.