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Finding the Fourth Proportional to 396,635.61, 595,189.80 and 143,935.82

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Solution

The fourth proportional to 396,635.61, 595,189.80 and 143,935.82 is: 215,989.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,635.61 : 595,189.80 = 143,935.82 : x
  2. Step 2: Convert to fraction form
    396,635.61/595,189.80 = 143,935.82/x
  3. Step 3: Cross multiply
    396,635.61x = 595,189.80 × 143,935.82
  4. Step 4: Simplify right side
    396,635.61x = 85,669,128,942.69
  5. Step 5: Solve for x
    x = 85,669,128,942.69/396,635.61
  6. Step 6: Final answer
    x = 215,989.50

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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.