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Finding the Fourth Proportional to 662,979.60, 994,469.40 and 411,037.20

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Solution

The fourth proportional to 662,979.60, 994,469.40 and 411,037.20 is: 616,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,979.60 : 994,469.40 = 411,037.20 : x
  2. Step 2: Convert to fraction form
    662,979.60/994,469.40 = 411,037.20/x
  3. Step 3: Cross multiply
    662,979.60x = 994,469.40 × 411,037.20
  4. Step 4: Simplify right side
    662,979.60x = 408,763,917,661.68
  5. Step 5: Solve for x
    x = 408,763,917,661.68/662,979.60
  6. Step 6: Final answer
    x = 616,555.80

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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.