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Finding the Fourth Proportional to 396,035.67, 593,856.90 and 126,128.63

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Solution

The fourth proportional to 396,035.67, 593,856.90 and 126,128.63 is: 189,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,035.67 : 593,856.90 = 126,128.63 : x
  2. Step 2: Convert to fraction form
    396,035.67/593,856.90 = 126,128.63/x
  3. Step 3: Cross multiply
    396,035.67x = 593,856.90 × 126,128.63
  4. Step 4: Simplify right side
    396,035.67x = 74,902,354,243.76
  5. Step 5: Solve for x
    x = 74,902,354,243.76/396,035.67
  6. Step 6: Final answer
    x = 189,130.32

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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.