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Finding the Fourth Proportional to 220.34, 331.65 and 193.88

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Solution

The fourth proportional to 220.34, 331.65 and 193.88 is: 291.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.34 : 331.65 = 193.88 : x
  2. Step 2: Convert to fraction form
    220.34/331.65 = 193.88/x
  3. Step 3: Cross multiply
    220.34x = 331.65 × 193.88
  4. Step 4: Simplify right side
    220.34x = 64,300.30
  5. Step 5: Solve for x
    x = 64,300.30/220.34
  6. Step 6: Final answer
    x = 291.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.