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Finding the Fourth Proportional to 262,821.20, 394,231.80 and 203,838.80

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Solution

The fourth proportional to 262,821.20, 394,231.80 and 203,838.80 is: 305,758.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,821.20 : 394,231.80 = 203,838.80 : x
  2. Step 2: Convert to fraction form
    262,821.20/394,231.80 = 203,838.80/x
  3. Step 3: Cross multiply
    262,821.20x = 394,231.80 × 203,838.80
  4. Step 4: Simplify right side
    262,821.20x = 80,359,737,033.84
  5. Step 5: Solve for x
    x = 80,359,737,033.84/262,821.20
  6. Step 6: Final answer
    x = 305,758.20

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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.