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Finding the Fourth Proportional to 262,991.52, 394,499.04 and 80,608.88

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Solution

The fourth proportional to 262,991.52, 394,499.04 and 80,608.88 is: 120,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,991.52 : 394,499.04 = 80,608.88 : x
  2. Step 2: Convert to fraction form
    262,991.52/394,499.04 = 80,608.88/x
  3. Step 3: Cross multiply
    262,991.52x = 394,499.04 × 80,608.88
  4. Step 4: Simplify right side
    262,991.52x = 31,800,125,372.43
  5. Step 5: Solve for x
    x = 31,800,125,372.43/262,991.52
  6. Step 6: Final answer
    x = 120,916.92

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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.