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Finding the Fourth Proportional to 394,161.81, 543,943.16 and 212,873.78

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Solution

The fourth proportional to 394,161.81, 543,943.16 and 212,873.78 is: 293,765.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,161.81 : 543,943.16 = 212,873.78 : x
  2. Step 2: Convert to fraction form
    394,161.81/543,943.16 = 212,873.78/x
  3. Step 3: Cross multiply
    394,161.81x = 543,943.16 × 212,873.78
  4. Step 4: Simplify right side
    394,161.81x = 115,791,232,790.26
  5. Step 5: Solve for x
    x = 115,791,232,790.26/394,161.81
  6. Step 6: Final answer
    x = 293,765.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.