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Finding the Fourth Proportional to 512,414.20, 768,621.30 and 196,878.70

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Solution

The fourth proportional to 512,414.20, 768,621.30 and 196,878.70 is: 295,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,414.20 : 768,621.30 = 196,878.70 : x
  2. Step 2: Convert to fraction form
    512,414.20/768,621.30 = 196,878.70/x
  3. Step 3: Cross multiply
    512,414.20x = 768,621.30 × 196,878.70
  4. Step 4: Simplify right side
    512,414.20x = 151,325,162,336.31
  5. Step 5: Solve for x
    x = 151,325,162,336.31/512,414.20
  6. Step 6: Final answer
    x = 295,318.05

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Similar ratio
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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.