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Finding the Fourth Proportional to 539,405.40, 809,108.10 and 437,928.60

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Solution

The fourth proportional to 539,405.40, 809,108.10 and 437,928.60 is: 656,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,405.40 : 809,108.10 = 437,928.60 : x
  2. Step 2: Convert to fraction form
    539,405.40/809,108.10 = 437,928.60/x
  3. Step 3: Cross multiply
    539,405.40x = 809,108.10 × 437,928.60
  4. Step 4: Simplify right side
    539,405.40x = 354,331,577,481.66
  5. Step 5: Solve for x
    x = 354,331,577,481.66/539,405.40
  6. Step 6: Final answer
    x = 656,892.90

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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.