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Finding the Third Proportional to 420,899 and 925,912

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Solution

The third proportional to 420,899 and 925,912 is: 2,036,861.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,899 : 925,912 = 925,912 : x
  2. Step 2: Convert to fraction form
    420,899/925,912 = 925,912/x
  3. Step 3: Cross multiply
    420,899x = 925,912 × 925,912
  4. Step 4: Simplify right side
    420,899x = 857,313,031,744
  5. Step 5: Solve for x
    x = 857,313,031,744/420,899
  6. Step 6: Final answer
    x = 2,036,861.65

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.