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Finding the Fourth Proportional to 321.01, 480.90 and 166.57

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Solution

The fourth proportional to 321.01, 480.90 and 166.57 is: 249.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.01 : 480.90 = 166.57 : x
  2. Step 2: Convert to fraction form
    321.01/480.90 = 166.57/x
  3. Step 3: Cross multiply
    321.01x = 480.90 × 166.57
  4. Step 4: Simplify right side
    321.01x = 80,103.51
  5. Step 5: Solve for x
    x = 80,103.51/321.01
  6. Step 6: Final answer
    x = 249.54

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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.