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Finding the Fourth Proportional to 443,589.40, 664,217.70 and 324,616.60

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Solution

The fourth proportional to 443,589.40, 664,217.70 and 324,616.60 is: 486,071.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,589.40 : 664,217.70 = 324,616.60 : x
  2. Step 2: Convert to fraction form
    443,589.40/664,217.70 = 324,616.60/x
  3. Step 3: Cross multiply
    443,589.40x = 664,217.70 × 324,616.60
  4. Step 4: Simplify right side
    443,589.40x = 215,616,091,433.82
  5. Step 5: Solve for x
    x = 215,616,091,433.82/443,589.40
  6. Step 6: Final answer
    x = 486,071.33

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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.