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Finding the Fourth Proportional to 512,979.20, 768,547.20 and 439,251.20

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Solution

The fourth proportional to 512,979.20, 768,547.20 and 439,251.20 is: 658,087.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,979.20 : 768,547.20 = 439,251.20 : x
  2. Step 2: Convert to fraction form
    512,979.20/768,547.20 = 439,251.20/x
  3. Step 3: Cross multiply
    512,979.20x = 768,547.20 × 439,251.20
  4. Step 4: Simplify right side
    512,979.20x = 337,585,279,856.64
  5. Step 5: Solve for x
    x = 337,585,279,856.64/512,979.20
  6. Step 6: Final answer
    x = 658,087.66

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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.