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Finding the Fourth Proportional to 241.20, 331.92 and 213.12

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Solution

The fourth proportional to 241.20, 331.92 and 213.12 is: 293.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.20 : 331.92 = 213.12 : x
  2. Step 2: Convert to fraction form
    241.20/331.92 = 213.12/x
  3. Step 3: Cross multiply
    241.20x = 331.92 × 213.12
  4. Step 4: Simplify right side
    241.20x = 70,738.79
  5. Step 5: Solve for x
    x = 70,738.79/241.20
  6. Step 6: Final answer
    x = 293.28

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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.