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Finding the Fourth Proportional to 222.58, 306.98 and 196.37

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Solution

The fourth proportional to 222.58, 306.98 and 196.37 is: 270.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.58 : 306.98 = 196.37 : x
  2. Step 2: Convert to fraction form
    222.58/306.98 = 196.37/x
  3. Step 3: Cross multiply
    222.58x = 306.98 × 196.37
  4. Step 4: Simplify right side
    222.58x = 60,282.48
  5. Step 5: Solve for x
    x = 60,282.48/222.58
  6. Step 6: Final answer
    x = 270.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.