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Finding the Third Proportional to 138,886 and 298,868

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Solution

The third proportional to 138,886 and 298,868 is: 643,132.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,886 : 298,868 = 298,868 : x
  2. Step 2: Convert to fraction form
    138,886/298,868 = 298,868/x
  3. Step 3: Cross multiply
    138,886x = 298,868 × 298,868
  4. Step 4: Simplify right side
    138,886x = 89,322,081,424
  5. Step 5: Solve for x
    x = 89,322,081,424/138,886
  6. Step 6: Final answer
    x = 643,132.36

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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.