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Finding the Third Proportional to 100,580 and 209,427

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Solution

The third proportional to 100,580 and 209,427 is: 436,067.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,580 : 209,427 = 209,427 : x
  2. Step 2: Convert to fraction form
    100,580/209,427 = 209,427/x
  3. Step 3: Cross multiply
    100,580x = 209,427 × 209,427
  4. Step 4: Simplify right side
    100,580x = 43,859,668,329
  5. Step 5: Solve for x
    x = 43,859,668,329/100,580
  6. Step 6: Final answer
    x = 436,067.49

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.