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Finding the Fourth Proportional to 235.09, 353.18 and 163.41

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Solution

The fourth proportional to 235.09, 353.18 and 163.41 is: 245.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.09 : 353.18 = 163.41 : x
  2. Step 2: Convert to fraction form
    235.09/353.18 = 163.41/x
  3. Step 3: Cross multiply
    235.09x = 353.18 × 163.41
  4. Step 4: Simplify right side
    235.09x = 57,713.14
  5. Step 5: Solve for x
    x = 57,713.14/235.09
  6. Step 6: Final answer
    x = 245.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.