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Finding the Fourth Proportional to 221.11, 331.69 and 58.80

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Solution

The fourth proportional to 221.11, 331.69 and 58.80 is: 88.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.11 : 331.69 = 58.80 : x
  2. Step 2: Convert to fraction form
    221.11/331.69 = 58.80/x
  3. Step 3: Cross multiply
    221.11x = 331.69 × 58.80
  4. Step 4: Simplify right side
    221.11x = 19,503.37
  5. Step 5: Solve for x
    x = 19,503.37/221.11
  6. Step 6: Final answer
    x = 88.21

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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.