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Finding the Third Proportional to 299,642 and 641,930

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Solution

The third proportional to 299,642 and 641,930 is: 1,375,221.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,642 : 641,930 = 641,930 : x
  2. Step 2: Convert to fraction form
    299,642/641,930 = 641,930/x
  3. Step 3: Cross multiply
    299,642x = 641,930 × 641,930
  4. Step 4: Simplify right side
    299,642x = 412,074,124,900
  5. Step 5: Solve for x
    x = 412,074,124,900/299,642
  6. Step 6: Final answer
    x = 1,375,221.51

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.