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Finding the Fourth Proportional to 664,654.40, 996,981.60 and 620,039.60

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Solution

The fourth proportional to 664,654.40, 996,981.60 and 620,039.60 is: 930,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,654.40 : 996,981.60 = 620,039.60 : x
  2. Step 2: Convert to fraction form
    664,654.40/996,981.60 = 620,039.60/x
  3. Step 3: Cross multiply
    664,654.40x = 996,981.60 × 620,039.60
  4. Step 4: Simplify right side
    664,654.40x = 618,168,072,471.36
  5. Step 5: Solve for x
    x = 618,168,072,471.36/664,654.40
  6. Step 6: Final answer
    x = 930,059.40

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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.