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Finding the Fourth Proportional to 263,289.96, 394,958.94 and 85,751.40

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Solution

The fourth proportional to 263,289.96, 394,958.94 and 85,751.40 is: 128,634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,289.96 : 394,958.94 = 85,751.40 : x
  2. Step 2: Convert to fraction form
    263,289.96/394,958.94 = 85,751.40/x
  3. Step 3: Cross multiply
    263,289.96x = 394,958.94 × 85,751.40
  4. Step 4: Simplify right side
    263,289.96x = 33,868,282,047.52
  5. Step 5: Solve for x
    x = 33,868,282,047.52/263,289.96
  6. Step 6: Final answer
    x = 128,634.92

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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.