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Finding the Fourth Proportional to 402.72, 603 and 331.44

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Solution

The fourth proportional to 402.72, 603 and 331.44 is: 496.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.72 : 603 = 331.44 : x
  2. Step 2: Convert to fraction form
    402.72/603 = 331.44/x
  3. Step 3: Cross multiply
    402.72x = 603 × 331.44
  4. Step 4: Simplify right side
    402.72x = 199,858.32
  5. Step 5: Solve for x
    x = 199,858.32/402.72
  6. Step 6: Final answer
    x = 496.27

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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.