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Finding the Fourth Proportional to 238.82, 358.28 and 84.75

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Solution

The fourth proportional to 238.82, 358.28 and 84.75 is: 127.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.82 : 358.28 = 84.75 : x
  2. Step 2: Convert to fraction form
    238.82/358.28 = 84.75/x
  3. Step 3: Cross multiply
    238.82x = 358.28 × 84.75
  4. Step 4: Simplify right side
    238.82x = 30,363.81
  5. Step 5: Solve for x
    x = 30,363.81/238.82
  6. Step 6: Final answer
    x = 127.14

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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.