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Finding the Fourth Proportional to 664,544.60, 996,816.90 and 412,602.20

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Solution

The fourth proportional to 664,544.60, 996,816.90 and 412,602.20 is: 618,903.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,544.60 : 996,816.90 = 412,602.20 : x
  2. Step 2: Convert to fraction form
    664,544.60/996,816.90 = 412,602.20/x
  3. Step 3: Cross multiply
    664,544.60x = 996,816.90 × 412,602.20
  4. Step 4: Simplify right side
    664,544.60x = 411,288,845,937.18
  5. Step 5: Solve for x
    x = 411,288,845,937.18/664,544.60
  6. Step 6: Final answer
    x = 618,903.30

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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.