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Finding the Fourth Proportional to 396,449.40, 593,459.10 and 218,411.40

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Solution

The fourth proportional to 396,449.40, 593,459.10 and 218,411.40 is: 326,947.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,449.40 : 593,459.10 = 218,411.40 : x
  2. Step 2: Convert to fraction form
    396,449.40/593,459.10 = 218,411.40/x
  3. Step 3: Cross multiply
    396,449.40x = 593,459.10 × 218,411.40
  4. Step 4: Simplify right side
    396,449.40x = 129,618,232,873.74
  5. Step 5: Solve for x
    x = 129,618,232,873.74/396,449.40
  6. Step 6: Final answer
    x = 326,947.73

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.