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Finding the Fourth Proportional to 258.05, 355.98 and 239.52

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Solution

The fourth proportional to 258.05, 355.98 and 239.52 is: 330.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.05 : 355.98 = 239.52 : x
  2. Step 2: Convert to fraction form
    258.05/355.98 = 239.52/x
  3. Step 3: Cross multiply
    258.05x = 355.98 × 239.52
  4. Step 4: Simplify right side
    258.05x = 85,263.13
  5. Step 5: Solve for x
    x = 85,263.13/258.05
  6. Step 6: Final answer
    x = 330.42

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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.