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Finding the Third Proportional to 100,408 and 209,132

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Solution

The third proportional to 100,408 and 209,132 is: 435,584.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,408 : 209,132 = 209,132 : x
  2. Step 2: Convert to fraction form
    100,408/209,132 = 209,132/x
  3. Step 3: Cross multiply
    100,408x = 209,132 × 209,132
  4. Step 4: Simplify right side
    100,408x = 43,736,193,424
  5. Step 5: Solve for x
    x = 43,736,193,424/100,408
  6. Step 6: Final answer
    x = 435,584.75

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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.