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Finding the Third Proportional to 138,858 and 298,812

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Solution

The third proportional to 138,858 and 298,812 is: 643,021.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,858 : 298,812 = 298,812 : x
  2. Step 2: Convert to fraction form
    138,858/298,812 = 298,812/x
  3. Step 3: Cross multiply
    138,858x = 298,812 × 298,812
  4. Step 4: Simplify right side
    138,858x = 89,288,611,344
  5. Step 5: Solve for x
    x = 89,288,611,344/138,858
  6. Step 6: Final answer
    x = 643,021.01

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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.