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Finding the Fourth Proportional to 258.06, 355.14 and 194.88

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Solution

The fourth proportional to 258.06, 355.14 and 194.88 is: 268.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.06 : 355.14 = 194.88 : x
  2. Step 2: Convert to fraction form
    258.06/355.14 = 194.88/x
  3. Step 3: Cross multiply
    258.06x = 355.14 × 194.88
  4. Step 4: Simplify right side
    258.06x = 69,209.68
  5. Step 5: Solve for x
    x = 69,209.68/258.06
  6. Step 6: Final answer
    x = 268.19

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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.