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Finding the Fourth Proportional to 222.40, 331.97 and 191.62

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Solution

The fourth proportional to 222.40, 331.97 and 191.62 is: 286.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.40 : 331.97 = 191.62 : x
  2. Step 2: Convert to fraction form
    222.40/331.97 = 191.62/x
  3. Step 3: Cross multiply
    222.40x = 331.97 × 191.62
  4. Step 4: Simplify right side
    222.40x = 63,612.09
  5. Step 5: Solve for x
    x = 63,612.09/222.40
  6. Step 6: Final answer
    x = 286.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.