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Finding the Third Proportional to 126,864 and 278,838

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Solution

The third proportional to 126,864 and 278,838 is: 612,865.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,864 : 278,838 = 278,838 : x
  2. Step 2: Convert to fraction form
    126,864/278,838 = 278,838/x
  3. Step 3: Cross multiply
    126,864x = 278,838 × 278,838
  4. Step 4: Simplify right side
    126,864x = 77,750,630,244
  5. Step 5: Solve for x
    x = 77,750,630,244/126,864
  6. Step 6: Final answer
    x = 612,865.98

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.