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Finding the Fourth Proportional to 248.13, 341.92 and 208.72

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Solution

The fourth proportional to 248.13, 341.92 and 208.72 is: 287.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.13 : 341.92 = 208.72 : x
  2. Step 2: Convert to fraction form
    248.13/341.92 = 208.72/x
  3. Step 3: Cross multiply
    248.13x = 341.92 × 208.72
  4. Step 4: Simplify right side
    248.13x = 71,365.54
  5. Step 5: Solve for x
    x = 71,365.54/248.13
  6. Step 6: Final answer
    x = 287.61

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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.