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Finding the Third Proportional to 135,912 and 289,320

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Solution

The third proportional to 135,912 and 289,320 is: 615,884.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,912 : 289,320 = 289,320 : x
  2. Step 2: Convert to fraction form
    135,912/289,320 = 289,320/x
  3. Step 3: Cross multiply
    135,912x = 289,320 × 289,320
  4. Step 4: Simplify right side
    135,912x = 83,706,062,400
  5. Step 5: Solve for x
    x = 83,706,062,400/135,912
  6. Step 6: Final answer
    x = 615,884.27

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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.