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Finding the Third Proportional to 309,874.50 and 656,952.75

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Solution

The third proportional to 309,874.50 and 656,952.75 is: 1,392,779.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,874.50 : 656,952.75 = 656,952.75 : x
  2. Step 2: Convert to fraction form
    309,874.50/656,952.75 = 656,952.75/x
  3. Step 3: Cross multiply
    309,874.50x = 656,952.75 × 656,952.75
  4. Step 4: Simplify right side
    309,874.50x = 431,586,915,732.56
  5. Step 5: Solve for x
    x = 431,586,915,732.56/309,874.50
  6. Step 6: Final answer
    x = 1,392,779.71

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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.