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Finding the Fourth Proportional to 605.88, 908.94 and 221.16

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Solution

The fourth proportional to 605.88, 908.94 and 221.16 is: 331.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.88 : 908.94 = 221.16 : x
  2. Step 2: Convert to fraction form
    605.88/908.94 = 221.16/x
  3. Step 3: Cross multiply
    605.88x = 908.94 × 221.16
  4. Step 4: Simplify right side
    605.88x = 201,021.17
  5. Step 5: Solve for x
    x = 201,021.17/605.88
  6. Step 6: Final answer
    x = 331.78

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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.