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Finding the Third Proportional to 269,916 and 396,120

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Solution

The third proportional to 269,916 and 396,120 is: 581,332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,916 : 396,120 = 396,120 : x
  2. Step 2: Convert to fraction form
    269,916/396,120 = 396,120/x
  3. Step 3: Cross multiply
    269,916x = 396,120 × 396,120
  4. Step 4: Simplify right side
    269,916x = 156,911,054,400
  5. Step 5: Solve for x
    x = 156,911,054,400/269,916
  6. Step 6: Final answer
    x = 581,332.91

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.