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Finding the Fourth Proportional to 238.69, 358.06 and 84.56

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Solution

The fourth proportional to 238.69, 358.06 and 84.56 is: 126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.69 : 358.06 = 84.56 : x
  2. Step 2: Convert to fraction form
    238.69/358.06 = 84.56/x
  3. Step 3: Cross multiply
    238.69x = 358.06 × 84.56
  4. Step 4: Simplify right side
    238.69x = 30,277.55
  5. Step 5: Solve for x
    x = 30,277.55/238.69
  6. Step 6: Final answer
    x = 126.85

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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.