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Finding the Fourth Proportional to 263,287.20, 394,815.60 and 105,463.20

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Solution

The fourth proportional to 263,287.20, 394,815.60 and 105,463.20 is: 158,148.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,287.20 : 394,815.60 = 105,463.20 : x
  2. Step 2: Convert to fraction form
    263,287.20/394,815.60 = 105,463.20/x
  3. Step 3: Cross multiply
    263,287.20x = 394,815.60 × 105,463.20
  4. Step 4: Simplify right side
    263,287.20x = 41,638,516,585.92
  5. Step 5: Solve for x
    x = 41,638,516,585.92/263,287.20
  6. Step 6: Final answer
    x = 158,148.66

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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.