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Finding the Third Proportional to 519,398 and 811,904

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Solution

The third proportional to 519,398 and 811,904 is: 1,269,138.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,398 : 811,904 = 811,904 : x
  2. Step 2: Convert to fraction form
    519,398/811,904 = 811,904/x
  3. Step 3: Cross multiply
    519,398x = 811,904 × 811,904
  4. Step 4: Simplify right side
    519,398x = 659,188,105,216
  5. Step 5: Solve for x
    x = 659,188,105,216/519,398
  6. Step 6: Final answer
    x = 1,269,138.71

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.