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Finding the Fourth Proportional to 394,279.54, 544,105.26 and 212,991.40

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Solution

The fourth proportional to 394,279.54, 544,105.26 and 212,991.40 is: 293,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,279.54 : 544,105.26 = 212,991.40 : x
  2. Step 2: Convert to fraction form
    394,279.54/544,105.26 = 212,991.40/x
  3. Step 3: Cross multiply
    394,279.54x = 544,105.26 × 212,991.40
  4. Step 4: Simplify right side
    394,279.54x = 115,889,741,074.76
  5. Step 5: Solve for x
    x = 115,889,741,074.76/394,279.54
  6. Step 6: Final answer
    x = 293,927.86

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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.