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Finding the Fourth Proportional to 394,414.80, 591,622.20 and 347,758.80

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Solution

The fourth proportional to 394,414.80, 591,622.20 and 347,758.80 is: 521,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,414.80 : 591,622.20 = 347,758.80 : x
  2. Step 2: Convert to fraction form
    394,414.80/591,622.20 = 347,758.80/x
  3. Step 3: Cross multiply
    394,414.80x = 591,622.20 × 347,758.80
  4. Step 4: Simplify right side
    394,414.80x = 205,741,826,325.36
  5. Step 5: Solve for x
    x = 205,741,826,325.36/394,414.80
  6. Step 6: Final answer
    x = 521,638.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.