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Finding the Fourth Proportional to 263,305.60, 394,861.20 and 85,818.40

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Solution

The fourth proportional to 263,305.60, 394,861.20 and 85,818.40 is: 128,695.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,305.60 : 394,861.20 = 85,818.40 : x
  2. Step 2: Convert to fraction form
    263,305.60/394,861.20 = 85,818.40/x
  3. Step 3: Cross multiply
    263,305.60x = 394,861.20 × 85,818.40
  4. Step 4: Simplify right side
    263,305.60x = 33,886,356,406.08
  5. Step 5: Solve for x
    x = 33,886,356,406.08/263,305.60
  6. Step 6: Final answer
    x = 128,695.92

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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.