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Finding the Fourth Proportional to 664,612.20, 996,918.30 and 398,235.60

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Solution

The fourth proportional to 664,612.20, 996,918.30 and 398,235.60 is: 597,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,612.20 : 996,918.30 = 398,235.60 : x
  2. Step 2: Convert to fraction form
    664,612.20/996,918.30 = 398,235.60/x
  3. Step 3: Cross multiply
    664,612.20x = 996,918.30 × 398,235.60
  4. Step 4: Simplify right side
    664,612.20x = 397,008,357,351.48
  5. Step 5: Solve for x
    x = 397,008,357,351.48/664,612.20
  6. Step 6: Final answer
    x = 597,353.40

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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.