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Finding the Fourth Proportional to 394,170.05, 543,954.59 and 212,881.97

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Solution

The fourth proportional to 394,170.05, 543,954.59 and 212,881.97 is: 293,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,170.05 : 543,954.59 = 212,881.97 : x
  2. Step 2: Convert to fraction form
    394,170.05/543,954.59 = 212,881.97/x
  3. Step 3: Cross multiply
    394,170.05x = 543,954.59 × 212,881.97
  4. Step 4: Simplify right side
    394,170.05x = 115,798,125,803.53
  5. Step 5: Solve for x
    x = 115,798,125,803.53/394,170.05
  6. Step 6: Final answer
    x = 293,777.08

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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.