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Finding the Third Proportional to 393,876 and 866,484

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Solution

The third proportional to 393,876 and 866,484 is: 1,906,169.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,876 : 866,484 = 866,484 : x
  2. Step 2: Convert to fraction form
    393,876/866,484 = 866,484/x
  3. Step 3: Cross multiply
    393,876x = 866,484 × 866,484
  4. Step 4: Simplify right side
    393,876x = 750,794,522,256
  5. Step 5: Solve for x
    x = 750,794,522,256/393,876
  6. Step 6: Final answer
    x = 1,906,169.76

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.