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Finding the Third Proportional to 118,910 and 257,422

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Solution

The third proportional to 118,910 and 257,422 is: 557,279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,910 : 257,422 = 257,422 : x
  2. Step 2: Convert to fraction form
    118,910/257,422 = 257,422/x
  3. Step 3: Cross multiply
    118,910x = 257,422 × 257,422
  4. Step 4: Simplify right side
    118,910x = 66,266,086,084
  5. Step 5: Solve for x
    x = 66,266,086,084/118,910
  6. Step 6: Final answer
    x = 557,279.34

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.