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Finding the Fourth Proportional to 263,298.60, 394,850.70 and 85,811.40

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Solution

The fourth proportional to 263,298.60, 394,850.70 and 85,811.40 is: 128,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,298.60 : 394,850.70 = 85,811.40 : x
  2. Step 2: Convert to fraction form
    263,298.60/394,850.70 = 85,811.40/x
  3. Step 3: Cross multiply
    263,298.60x = 394,850.70 × 85,811.40
  4. Step 4: Simplify right side
    263,298.60x = 33,882,691,357.98
  5. Step 5: Solve for x
    x = 33,882,691,357.98/263,298.60
  6. Step 6: Final answer
    x = 128,685.42

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.