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Finding the Third Proportional to 276,366 and 391,116

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Solution

The third proportional to 276,366 and 391,116 is: 553,511.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,366 : 391,116 = 391,116 : x
  2. Step 2: Convert to fraction form
    276,366/391,116 = 391,116/x
  3. Step 3: Cross multiply
    276,366x = 391,116 × 391,116
  4. Step 4: Simplify right side
    276,366x = 152,971,725,456
  5. Step 5: Solve for x
    x = 152,971,725,456/276,366
  6. Step 6: Final answer
    x = 553,511.38

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.