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Finding the Fourth Proportional to 238.88, 358.36 and 117.15

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Solution

The fourth proportional to 238.88, 358.36 and 117.15 is: 175.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.88 : 358.36 = 117.15 : x
  2. Step 2: Convert to fraction form
    238.88/358.36 = 117.15/x
  3. Step 3: Cross multiply
    238.88x = 358.36 × 117.15
  4. Step 4: Simplify right side
    238.88x = 41,983.58
  5. Step 5: Solve for x
    x = 41,983.58/238.88
  6. Step 6: Final answer
    x = 175.75

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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.