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Finding the Fourth Proportional to 243.62, 364.71 and 161.21

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Solution

The fourth proportional to 243.62, 364.71 and 161.21 is: 241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.62 : 364.71 = 161.21 : x
  2. Step 2: Convert to fraction form
    243.62/364.71 = 161.21/x
  3. Step 3: Cross multiply
    243.62x = 364.71 × 161.21
  4. Step 4: Simplify right side
    243.62x = 58,793.08
  5. Step 5: Solve for x
    x = 58,793.08/243.62
  6. Step 6: Final answer
    x = 241.33

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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.