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Finding the Third Proportional to 138,474 and 298,168

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Solution

The third proportional to 138,474 and 298,168 is: 642,027.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,474 : 298,168 = 298,168 : x
  2. Step 2: Convert to fraction form
    138,474/298,168 = 298,168/x
  3. Step 3: Cross multiply
    138,474x = 298,168 × 298,168
  4. Step 4: Simplify right side
    138,474x = 88,904,156,224
  5. Step 5: Solve for x
    x = 88,904,156,224/138,474
  6. Step 6: Final answer
    x = 642,027.79

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.