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Finding the Fourth Proportional to 238.88, 358.68 and 212

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Solution

The fourth proportional to 238.88, 358.68 and 212 is: 318.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.88 : 358.68 = 212 : x
  2. Step 2: Convert to fraction form
    238.88/358.68 = 212/x
  3. Step 3: Cross multiply
    238.88x = 358.68 × 212
  4. Step 4: Simplify right side
    238.88x = 76,040.16
  5. Step 5: Solve for x
    x = 76,040.16/238.88
  6. Step 6: Final answer
    x = 318.32

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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.