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Finding the Fourth Proportional to 221.07, 331.60 and 58.75

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Solution

The fourth proportional to 221.07, 331.60 and 58.75 is: 88.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.07 : 331.60 = 58.75 : x
  2. Step 2: Convert to fraction form
    221.07/331.60 = 58.75/x
  3. Step 3: Cross multiply
    221.07x = 331.60 × 58.75
  4. Step 4: Simplify right side
    221.07x = 19,481.99
  5. Step 5: Solve for x
    x = 19,481.99/221.07
  6. Step 6: Final answer
    x = 88.13

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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.