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Finding the Fourth Proportional to 262,891.60, 394,337.40 and 85,416.55

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Solution

The fourth proportional to 262,891.60, 394,337.40 and 85,416.55 is: 128,124.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,891.60 : 394,337.40 = 85,416.55 : x
  2. Step 2: Convert to fraction form
    262,891.60/394,337.40 = 85,416.55/x
  3. Step 3: Cross multiply
    262,891.60x = 394,337.40 × 85,416.55
  4. Step 4: Simplify right side
    262,891.60x = 33,682,940,243.97
  5. Step 5: Solve for x
    x = 33,682,940,243.97/262,891.60
  6. Step 6: Final answer
    x = 128,124.83

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1.5x scale

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.