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Finding the Third Proportional to 299,781 and 642,295

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Solution

The third proportional to 299,781 and 642,295 is: 1,376,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,781 : 642,295 = 642,295 : x
  2. Step 2: Convert to fraction form
    299,781/642,295 = 642,295/x
  3. Step 3: Cross multiply
    299,781x = 642,295 × 642,295
  4. Step 4: Simplify right side
    299,781x = 412,542,867,025
  5. Step 5: Solve for x
    x = 412,542,867,025/299,781
  6. Step 6: Final answer
    x = 1,376,147.48

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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.