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Finding the Fourth Proportional to 235.08, 324.40 and 161.39

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Solution

The fourth proportional to 235.08, 324.40 and 161.39 is: 222.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.08 : 324.40 = 161.39 : x
  2. Step 2: Convert to fraction form
    235.08/324.40 = 161.39/x
  3. Step 3: Cross multiply
    235.08x = 324.40 × 161.39
  4. Step 4: Simplify right side
    235.08x = 52,354.11
  5. Step 5: Solve for x
    x = 52,354.11/235.08
  6. Step 6: Final answer
    x = 222.71

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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.