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Finding the Fourth Proportional to 512,959.20, 768,517.20 and 439,231.20

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Solution

The fourth proportional to 512,959.20, 768,517.20 and 439,231.20 is: 658,057.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,959.20 : 768,517.20 = 439,231.20 : x
  2. Step 2: Convert to fraction form
    512,959.20/768,517.20 = 439,231.20/x
  3. Step 3: Cross multiply
    512,959.20x = 768,517.20 × 439,231.20
  4. Step 4: Simplify right side
    512,959.20x = 337,556,731,976.64
  5. Step 5: Solve for x
    x = 337,556,731,976.64/512,959.20
  6. Step 6: Final answer
    x = 658,057.66

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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.