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Finding the Fourth Proportional to 321.37, 481.41 and 147.79

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Solution

The fourth proportional to 321.37, 481.41 and 147.79 is: 221.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.37 : 481.41 = 147.79 : x
  2. Step 2: Convert to fraction form
    321.37/481.41 = 147.79/x
  3. Step 3: Cross multiply
    321.37x = 481.41 × 147.79
  4. Step 4: Simplify right side
    321.37x = 71,148.58
  5. Step 5: Solve for x
    x = 71,148.58/321.37
  6. Step 6: Final answer
    x = 221.39

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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.