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Finding the Third Proportional to 135,809 and 298,690

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Solution

The third proportional to 135,809 and 298,690 is: 656,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,809 : 298,690 = 298,690 : x
  2. Step 2: Convert to fraction form
    135,809/298,690 = 298,690/x
  3. Step 3: Cross multiply
    135,809x = 298,690 × 298,690
  4. Step 4: Simplify right side
    135,809x = 89,215,716,100
  5. Step 5: Solve for x
    x = 89,215,716,100/135,809
  6. Step 6: Final answer
    x = 656,920.50

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.