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Finding the Fourth Proportional to 238.75, 358.12 and 84.68

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Solution

The fourth proportional to 238.75, 358.12 and 84.68 is: 127.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.75 : 358.12 = 84.68 : x
  2. Step 2: Convert to fraction form
    238.75/358.12 = 84.68/x
  3. Step 3: Cross multiply
    238.75x = 358.12 × 84.68
  4. Step 4: Simplify right side
    238.75x = 30,325.60
  5. Step 5: Solve for x
    x = 30,325.60/238.75
  6. Step 6: Final answer
    x = 127.02

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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.