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Finding the Fourth Proportional to 221.21, 331.79 and 58.89

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Solution

The fourth proportional to 221.21, 331.79 and 58.89 is: 88.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.21 : 331.79 = 58.89 : x
  2. Step 2: Convert to fraction form
    221.21/331.79 = 58.89/x
  3. Step 3: Cross multiply
    221.21x = 331.79 × 58.89
  4. Step 4: Simplify right side
    221.21x = 19,539.11
  5. Step 5: Solve for x
    x = 19,539.11/221.21
  6. Step 6: Final answer
    x = 88.33

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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.