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Finding the Fourth Proportional to 394,505.90, 543,990 and 251,082.44

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Solution

The fourth proportional to 394,505.90, 543,990 and 251,082.44 is: 346,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,505.90 : 543,990 = 251,082.44 : x
  2. Step 2: Convert to fraction form
    394,505.90/543,990 = 251,082.44/x
  3. Step 3: Cross multiply
    394,505.90x = 543,990 × 251,082.44
  4. Step 4: Simplify right side
    394,505.90x = 136,586,336,535.60
  5. Step 5: Solve for x
    x = 136,586,336,535.60/394,505.90
  6. Step 6: Final answer
    x = 346,221.28

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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.