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Finding the Third Proportional to 189,218 and 407,812

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Solution

The third proportional to 189,218 and 407,812 is: 878,936.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,218 : 407,812 = 407,812 : x
  2. Step 2: Convert to fraction form
    189,218/407,812 = 407,812/x
  3. Step 3: Cross multiply
    189,218x = 407,812 × 407,812
  4. Step 4: Simplify right side
    189,218x = 166,310,627,344
  5. Step 5: Solve for x
    x = 166,310,627,344/189,218
  6. Step 6: Final answer
    x = 878,936.61

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.