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Finding the Fourth Proportional to 539,905.20, 809,857.80 and 165,879.60

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Solution

The fourth proportional to 539,905.20, 809,857.80 and 165,879.60 is: 248,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,905.20 : 809,857.80 = 165,879.60 : x
  2. Step 2: Convert to fraction form
    539,905.20/809,857.80 = 165,879.60/x
  3. Step 3: Cross multiply
    539,905.20x = 809,857.80 × 165,879.60
  4. Step 4: Simplify right side
    539,905.20x = 134,338,887,920.88
  5. Step 5: Solve for x
    x = 134,338,887,920.88/539,905.20
  6. Step 6: Final answer
    x = 248,819.40

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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.