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Finding the Fourth Proportional to 263,178.60, 394,780.05 and 128,366.66

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Solution

The fourth proportional to 263,178.60, 394,780.05 and 128,366.66 is: 192,555.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,178.60 : 394,780.05 = 128,366.66 : x
  2. Step 2: Convert to fraction form
    263,178.60/394,780.05 = 128,366.66/x
  3. Step 3: Cross multiply
    263,178.60x = 394,780.05 × 128,366.66
  4. Step 4: Simplify right side
    263,178.60x = 50,676,594,479.23
  5. Step 5: Solve for x
    x = 50,676,594,479.23/263,178.60
  6. Step 6: Final answer
    x = 192,555.91

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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.