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Finding the Fourth Proportional to 664,902.40, 996,770.40 and 398,768.80

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Solution

The fourth proportional to 664,902.40, 996,770.40 and 398,768.80 is: 597,803.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,902.40 : 996,770.40 = 398,768.80 : x
  2. Step 2: Convert to fraction form
    664,902.40/996,770.40 = 398,768.80/x
  3. Step 3: Cross multiply
    664,902.40x = 996,770.40 × 398,768.80
  4. Step 4: Simplify right side
    664,902.40x = 397,480,936,283.52
  5. Step 5: Solve for x
    x = 397,480,936,283.52/664,902.40
  6. Step 6: Final answer
    x = 597,803.43

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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.