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Finding the Fourth Proportional to 664,005.20, 996,007.80 and 612,683.60

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Solution

The fourth proportional to 664,005.20, 996,007.80 and 612,683.60 is: 919,025.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,005.20 : 996,007.80 = 612,683.60 : x
  2. Step 2: Convert to fraction form
    664,005.20/996,007.80 = 612,683.60/x
  3. Step 3: Cross multiply
    664,005.20x = 996,007.80 × 612,683.60
  4. Step 4: Simplify right side
    664,005.20x = 610,237,644,532.08
  5. Step 5: Solve for x
    x = 610,237,644,532.08/664,005.20
  6. Step 6: Final answer
    x = 919,025.40

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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.