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Finding the Fourth Proportional to 539,400.30, 809,100.45 and 339,945.90

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Solution

The fourth proportional to 539,400.30, 809,100.45 and 339,945.90 is: 509,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,400.30 : 809,100.45 = 339,945.90 : x
  2. Step 2: Convert to fraction form
    539,400.30/809,100.45 = 339,945.90/x
  3. Step 3: Cross multiply
    539,400.30x = 809,100.45 × 339,945.90
  4. Step 4: Simplify right side
    539,400.30x = 275,050,380,665.66
  5. Step 5: Solve for x
    x = 275,050,380,665.66/539,400.30
  6. Step 6: Final answer
    x = 509,918.85

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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.