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Finding the Fourth Proportional to 222.21, 331.59 and 196.14

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Solution

The fourth proportional to 222.21, 331.59 and 196.14 is: 292.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.21 : 331.59 = 196.14 : x
  2. Step 2: Convert to fraction form
    222.21/331.59 = 196.14/x
  3. Step 3: Cross multiply
    222.21x = 331.59 × 196.14
  4. Step 4: Simplify right side
    222.21x = 65,038.06
  5. Step 5: Solve for x
    x = 65,038.06/222.21
  6. Step 6: Final answer
    x = 292.69

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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.