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Finding the Third Proportional to 299,732 and 641,980

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Solution

The third proportional to 299,732 and 641,980 is: 1,375,022.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,732 : 641,980 = 641,980 : x
  2. Step 2: Convert to fraction form
    299,732/641,980 = 641,980/x
  3. Step 3: Cross multiply
    299,732x = 641,980 × 641,980
  4. Step 4: Simplify right side
    299,732x = 412,138,320,400
  5. Step 5: Solve for x
    x = 412,138,320,400/299,732
  6. Step 6: Final answer
    x = 1,375,022.75

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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.