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Finding the Third Proportional to 138,908 and 207,448

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Solution

The third proportional to 138,908 and 207,448 is: 309,807.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,908 : 207,448 = 207,448 : x
  2. Step 2: Convert to fraction form
    138,908/207,448 = 207,448/x
  3. Step 3: Cross multiply
    138,908x = 207,448 × 207,448
  4. Step 4: Simplify right side
    138,908x = 43,034,672,704
  5. Step 5: Solve for x
    x = 43,034,672,704/138,908
  6. Step 6: Final answer
    x = 309,807.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.