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Finding the Fourth Proportional to 235.55, 324.78 and 222.56

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Solution

The fourth proportional to 235.55, 324.78 and 222.56 is: 306.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.55 : 324.78 = 222.56 : x
  2. Step 2: Convert to fraction form
    235.55/324.78 = 222.56/x
  3. Step 3: Cross multiply
    235.55x = 324.78 × 222.56
  4. Step 4: Simplify right side
    235.55x = 72,283.85
  5. Step 5: Solve for x
    x = 72,283.85/235.55
  6. Step 6: Final answer
    x = 306.87

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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.