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Finding the Third Proportional to 135,800 and 289,120

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Solution

The third proportional to 135,800 and 289,120 is: 615,540.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,800 : 289,120 = 289,120 : x
  2. Step 2: Convert to fraction form
    135,800/289,120 = 289,120/x
  3. Step 3: Cross multiply
    135,800x = 289,120 × 289,120
  4. Step 4: Simplify right side
    135,800x = 83,590,374,400
  5. Step 5: Solve for x
    x = 83,590,374,400/135,800
  6. Step 6: Final answer
    x = 615,540.31

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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.