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Finding the Third Proportional to 138,529 and 298,246

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Solution

The third proportional to 138,529 and 298,246 is: 642,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,529 : 298,246 = 298,246 : x
  2. Step 2: Convert to fraction form
    138,529/298,246 = 298,246/x
  3. Step 3: Cross multiply
    138,529x = 298,246 × 298,246
  4. Step 4: Simplify right side
    138,529x = 88,950,676,516
  5. Step 5: Solve for x
    x = 88,950,676,516/138,529
  6. Step 6: Final answer
    x = 642,108.70

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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.