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Finding the Fourth Proportional to 539,560.20, 809,340.30 and 259,009.80

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Solution

The fourth proportional to 539,560.20, 809,340.30 and 259,009.80 is: 388,514.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,560.20 : 809,340.30 = 259,009.80 : x
  2. Step 2: Convert to fraction form
    539,560.20/809,340.30 = 259,009.80/x
  3. Step 3: Cross multiply
    539,560.20x = 809,340.30 × 259,009.80
  4. Step 4: Simplify right side
    539,560.20x = 209,627,069,234.94
  5. Step 5: Solve for x
    x = 209,627,069,234.94/539,560.20
  6. Step 6: Final answer
    x = 388,514.70

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Double scale
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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.