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Finding the Fourth Proportional to 321.52, 482 and 159

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Solution

The fourth proportional to 321.52, 482 and 159 is: 238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.52 : 482 = 159 : x
  2. Step 2: Convert to fraction form
    321.52/482 = 159/x
  3. Step 3: Cross multiply
    321.52x = 482 × 159
  4. Step 4: Simplify right side
    321.52x = 76,638
  5. Step 5: Solve for x
    x = 76,638/321.52
  6. Step 6: Final answer
    x = 238.36

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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.