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Finding the Fourth Proportional to 539,546.20, 809,319.30 and 258,995.80

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Solution

The fourth proportional to 539,546.20, 809,319.30 and 258,995.80 is: 388,493.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,546.20 : 809,319.30 = 258,995.80 : x
  2. Step 2: Convert to fraction form
    539,546.20/809,319.30 = 258,995.80/x
  3. Step 3: Cross multiply
    539,546.20x = 809,319.30 × 258,995.80
  4. Step 4: Simplify right side
    539,546.20x = 209,610,299,558.94
  5. Step 5: Solve for x
    x = 209,610,299,558.94/539,546.20
  6. Step 6: Final answer
    x = 388,493.70

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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.