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Finding the Fourth Proportional to 285,879.99, 394,517.46 and 158,563.78

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Solution

The fourth proportional to 285,879.99, 394,517.46 and 158,563.78 is: 218,819.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,879.99 : 394,517.46 = 158,563.78 : x
  2. Step 2: Convert to fraction form
    285,879.99/394,517.46 = 158,563.78/x
  3. Step 3: Cross multiply
    285,879.99x = 394,517.46 × 158,563.78
  4. Step 4: Simplify right side
    285,879.99x = 62,556,179,733.60
  5. Step 5: Solve for x
    x = 62,556,179,733.60/285,879.99
  6. Step 6: Final answer
    x = 218,819.72

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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.