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Finding the Third Proportional to 126,278 and 256,908

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Solution

The third proportional to 126,278 and 256,908 is: 522,669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,278 : 256,908 = 256,908 : x
  2. Step 2: Convert to fraction form
    126,278/256,908 = 256,908/x
  3. Step 3: Cross multiply
    126,278x = 256,908 × 256,908
  4. Step 4: Simplify right side
    126,278x = 66,001,720,464
  5. Step 5: Solve for x
    x = 66,001,720,464/126,278
  6. Step 6: Final answer
    x = 522,669.99

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.