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Finding the Fourth Proportional to 221.21, 331.77 and 58.85

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Solution

The fourth proportional to 221.21, 331.77 and 58.85 is: 88.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.21 : 331.77 = 58.85 : x
  2. Step 2: Convert to fraction form
    221.21/331.77 = 58.85/x
  3. Step 3: Cross multiply
    221.21x = 331.77 × 58.85
  4. Step 4: Simplify right side
    221.21x = 19,525.24
  5. Step 5: Solve for x
    x = 19,525.24/221.21
  6. Step 6: Final answer
    x = 88.27

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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.