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Finding the Fourth Proportional to 396,288.45, 594,477.78 and 143,687.91

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Solution

The fourth proportional to 396,288.45, 594,477.78 and 143,687.91 is: 215,548.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,288.45 : 594,477.78 = 143,687.91 : x
  2. Step 2: Convert to fraction form
    396,288.45/594,477.78 = 143,687.91/x
  3. Step 3: Cross multiply
    396,288.45x = 594,477.78 × 143,687.91
  4. Step 4: Simplify right side
    396,288.45x = 85,419,269,749.64
  5. Step 5: Solve for x
    x = 85,419,269,749.64/396,288.45
  6. Step 6: Final answer
    x = 215,548.22

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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.