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Finding the Fourth Proportional to 258.02, 355.90 and 249.11

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Solution

The fourth proportional to 258.02, 355.90 and 249.11 is: 343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.02 : 355.90 = 249.11 : x
  2. Step 2: Convert to fraction form
    258.02/355.90 = 249.11/x
  3. Step 3: Cross multiply
    258.02x = 355.90 × 249.11
  4. Step 4: Simplify right side
    258.02x = 88,657.00
  5. Step 5: Solve for x
    x = 88,657.00/258.02
  6. Step 6: Final answer
    x = 343.61

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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.