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Finding the Fourth Proportional to 437.88, 655.94 and 221.24

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Solution

The fourth proportional to 437.88, 655.94 and 221.24 is: 331.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.88 : 655.94 = 221.24 : x
  2. Step 2: Convert to fraction form
    437.88/655.94 = 221.24/x
  3. Step 3: Cross multiply
    437.88x = 655.94 × 221.24
  4. Step 4: Simplify right side
    437.88x = 145,120.17
  5. Step 5: Solve for x
    x = 145,120.17/437.88
  6. Step 6: Final answer
    x = 331.42

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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.