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Finding the Fourth Proportional to 235.11, 350.95 and 218.22

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Solution

The fourth proportional to 235.11, 350.95 and 218.22 is: 325.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.11 : 350.95 = 218.22 : x
  2. Step 2: Convert to fraction form
    235.11/350.95 = 218.22/x
  3. Step 3: Cross multiply
    235.11x = 350.95 × 218.22
  4. Step 4: Simplify right side
    235.11x = 76,584.31
  5. Step 5: Solve for x
    x = 76,584.31/235.11
  6. Step 6: Final answer
    x = 325.74

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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.