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Finding the Fourth Proportional to 396,628.46, 595,179.10 and 143,928.67

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Solution

The fourth proportional to 396,628.46, 595,179.10 and 143,928.67 is: 215,978.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,628.46 : 595,179.10 = 143,928.67 : x
  2. Step 2: Convert to fraction form
    396,628.46/595,179.10 = 143,928.67/x
  3. Step 3: Cross multiply
    396,628.46x = 595,179.10 × 143,928.67
  4. Step 4: Simplify right side
    396,628.46x = 85,663,334,427.03
  5. Step 5: Solve for x
    x = 85,663,334,427.03/396,628.46
  6. Step 6: Final answer
    x = 215,978.79

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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.