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Finding the Fourth Proportional to 396,633.36, 595,186.43 and 143,933.57

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Solution

The fourth proportional to 396,633.36, 595,186.43 and 143,933.57 is: 215,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,633.36 : 595,186.43 = 143,933.57 : x
  2. Step 2: Convert to fraction form
    396,633.36/595,186.43 = 143,933.57/x
  3. Step 3: Cross multiply
    396,633.36x = 595,186.43 × 143,933.57
  4. Step 4: Simplify right side
    396,633.36x = 85,667,303,989.86
  5. Step 5: Solve for x
    x = 85,667,303,989.86/396,633.36
  6. Step 6: Final answer
    x = 215,986.13

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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.