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Finding the Fourth Proportional to 238.91, 358.17 and 117.09

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Solution

The fourth proportional to 238.91, 358.17 and 117.09 is: 175.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.91 : 358.17 = 117.09 : x
  2. Step 2: Convert to fraction form
    238.91/358.17 = 117.09/x
  3. Step 3: Cross multiply
    238.91x = 358.17 × 117.09
  4. Step 4: Simplify right side
    238.91x = 41,938.13
  5. Step 5: Solve for x
    x = 41,938.13/238.91
  6. Step 6: Final answer
    x = 175.54

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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.