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Finding the Fourth Proportional to 221.37, 331.98 and 195.72

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Solution

The fourth proportional to 221.37, 331.98 and 195.72 is: 293.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.37 : 331.98 = 195.72 : x
  2. Step 2: Convert to fraction form
    221.37/331.98 = 195.72/x
  3. Step 3: Cross multiply
    221.37x = 331.98 × 195.72
  4. Step 4: Simplify right side
    221.37x = 64,973.47
  5. Step 5: Solve for x
    x = 64,973.47/221.37
  6. Step 6: Final answer
    x = 293.51

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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.