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Finding the Fourth Proportional to 240.71, 331.29 and 209.48

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Solution

The fourth proportional to 240.71, 331.29 and 209.48 is: 288.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.71 : 331.29 = 209.48 : x
  2. Step 2: Convert to fraction form
    240.71/331.29 = 209.48/x
  3. Step 3: Cross multiply
    240.71x = 331.29 × 209.48
  4. Step 4: Simplify right side
    240.71x = 69,396.97
  5. Step 5: Solve for x
    x = 69,396.97/240.71
  6. Step 6: Final answer
    x = 288.31

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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.