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Finding the Fourth Proportional to 238.25, 357.41 and 84.15

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Solution

The fourth proportional to 238.25, 357.41 and 84.15 is: 126.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.25 : 357.41 = 84.15 : x
  2. Step 2: Convert to fraction form
    238.25/357.41 = 84.15/x
  3. Step 3: Cross multiply
    238.25x = 357.41 × 84.15
  4. Step 4: Simplify right side
    238.25x = 30,074.78
  5. Step 5: Solve for x
    x = 30,074.78/238.25
  6. Step 6: Final answer
    x = 126.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.