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Finding the Fourth Proportional to 663,323.40, 994,401.90 and 397,189.80

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Solution

The fourth proportional to 663,323.40, 994,401.90 and 397,189.80 is: 595,435.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,323.40 : 994,401.90 = 397,189.80 : x
  2. Step 2: Convert to fraction form
    663,323.40/994,401.90 = 397,189.80/x
  3. Step 3: Cross multiply
    663,323.40x = 994,401.90 × 397,189.80
  4. Step 4: Simplify right side
    663,323.40x = 394,966,291,780.62
  5. Step 5: Solve for x
    x = 394,966,291,780.62/663,323.40
  6. Step 6: Final answer
    x = 595,435.49

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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.