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Finding the Fourth Proportional to 396,990.42, 595,518.42 and 127,157.94

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Solution

The fourth proportional to 396,990.42, 595,518.42 and 127,157.94 is: 190,747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,990.42 : 595,518.42 = 127,157.94 : x
  2. Step 2: Convert to fraction form
    396,990.42/595,518.42 = 127,157.94/x
  3. Step 3: Cross multiply
    396,990.42x = 595,518.42 × 127,157.94
  4. Step 4: Simplify right side
    396,990.42x = 75,724,895,519.25
  5. Step 5: Solve for x
    x = 75,724,895,519.25/396,990.42
  6. Step 6: Final answer
    x = 190,747.41

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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.