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Finding the Third Proportional to 120,659 and 257,338

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Solution

The third proportional to 120,659 and 257,338 is: 548,842.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,659 : 257,338 = 257,338 : x
  2. Step 2: Convert to fraction form
    120,659/257,338 = 257,338/x
  3. Step 3: Cross multiply
    120,659x = 257,338 × 257,338
  4. Step 4: Simplify right side
    120,659x = 66,222,846,244
  5. Step 5: Solve for x
    x = 66,222,846,244/120,659
  6. Step 6: Final answer
    x = 548,842.99

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.