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Finding the Fourth Proportional to 394,247.25, 544,061.21 and 215,399.25

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Solution

The fourth proportional to 394,247.25, 544,061.21 and 215,399.25 is: 297,250.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,247.25 : 544,061.21 = 215,399.25 : x
  2. Step 2: Convert to fraction form
    394,247.25/544,061.21 = 215,399.25/x
  3. Step 3: Cross multiply
    394,247.25x = 544,061.21 × 215,399.25
  4. Step 4: Simplify right side
    394,247.25x = 117,190,375,511.10
  5. Step 5: Solve for x
    x = 117,190,375,511.10/394,247.25
  6. Step 6: Final answer
    x = 297,250.97

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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.