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Finding the Third Proportional to 272,120 and 409,218

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Solution

The third proportional to 272,120 and 409,218 is: 615,387.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,120 : 409,218 = 409,218 : x
  2. Step 2: Convert to fraction form
    272,120/409,218 = 409,218/x
  3. Step 3: Cross multiply
    272,120x = 409,218 × 409,218
  4. Step 4: Simplify right side
    272,120x = 167,459,371,524
  5. Step 5: Solve for x
    x = 167,459,371,524/272,120
  6. Step 6: Final answer
    x = 615,387.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.