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Finding the Fourth Proportional to 394,474, 544,374.12 and 215,626

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Solution

The fourth proportional to 394,474, 544,374.12 and 215,626 is: 297,563.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,474 : 544,374.12 = 215,626 : x
  2. Step 2: Convert to fraction form
    394,474/544,374.12 = 215,626/x
  3. Step 3: Cross multiply
    394,474x = 544,374.12 × 215,626
  4. Step 4: Simplify right side
    394,474x = 117,381,213,999.12
  5. Step 5: Solve for x
    x = 117,381,213,999.12/394,474
  6. Step 6: Final answer
    x = 297,563.88

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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.