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Finding the Fourth Proportional to 664,243.20, 996,364.80 and 612,921.60

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Solution

The fourth proportional to 664,243.20, 996,364.80 and 612,921.60 is: 919,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,243.20 : 996,364.80 = 612,921.60 : x
  2. Step 2: Convert to fraction form
    664,243.20/996,364.80 = 612,921.60/x
  3. Step 3: Cross multiply
    664,243.20x = 996,364.80 × 612,921.60
  4. Step 4: Simplify right side
    664,243.20x = 610,693,507,399.68
  5. Step 5: Solve for x
    x = 610,693,507,399.68/664,243.20
  6. Step 6: Final answer
    x = 919,382.40

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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.