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Finding the Fourth Proportional to 394,112.59, 543,963.90 and 258,067.52

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Solution

The fourth proportional to 394,112.59, 543,963.90 and 258,067.52 is: 356,191.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,112.59 : 543,963.90 = 258,067.52 : x
  2. Step 2: Convert to fraction form
    394,112.59/543,963.90 = 258,067.52/x
  3. Step 3: Cross multiply
    394,112.59x = 543,963.90 × 258,067.52
  4. Step 4: Simplify right side
    394,112.59x = 140,379,416,002.44
  5. Step 5: Solve for x
    x = 140,379,416,002.44/394,112.59
  6. Step 6: Final answer
    x = 356,191.15

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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.