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Finding the Fourth Proportional to 241.92, 361.98 and 209.79

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Solution

The fourth proportional to 241.92, 361.98 and 209.79 is: 313.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.92 : 361.98 = 209.79 : x
  2. Step 2: Convert to fraction form
    241.92/361.98 = 209.79/x
  3. Step 3: Cross multiply
    241.92x = 361.98 × 209.79
  4. Step 4: Simplify right side
    241.92x = 75,939.78
  5. Step 5: Solve for x
    x = 75,939.78/241.92
  6. Step 6: Final answer
    x = 313.90

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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.