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Finding the Fourth Proportional to 243.27, 335.95 and 208.09

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Solution

The fourth proportional to 243.27, 335.95 and 208.09 is: 287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.27 : 335.95 = 208.09 : x
  2. Step 2: Convert to fraction form
    243.27/335.95 = 208.09/x
  3. Step 3: Cross multiply
    243.27x = 335.95 × 208.09
  4. Step 4: Simplify right side
    243.27x = 69,907.84
  5. Step 5: Solve for x
    x = 69,907.84/243.27
  6. Step 6: Final answer
    x = 287.37

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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.