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Finding the Third Proportional to 403,782 and 878,280

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Solution

The third proportional to 403,782 and 878,280 is: 1,910,376.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,782 : 878,280 = 878,280 : x
  2. Step 2: Convert to fraction form
    403,782/878,280 = 878,280/x
  3. Step 3: Cross multiply
    403,782x = 878,280 × 878,280
  4. Step 4: Simplify right side
    403,782x = 771,375,758,400
  5. Step 5: Solve for x
    x = 771,375,758,400/403,782
  6. Step 6: Final answer
    x = 1,910,376.78

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.