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Finding the Fourth Proportional to 320.75, 481.28 and 166.60

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Solution

The fourth proportional to 320.75, 481.28 and 166.60 is: 249.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.75 : 481.28 = 166.60 : x
  2. Step 2: Convert to fraction form
    320.75/481.28 = 166.60/x
  3. Step 3: Cross multiply
    320.75x = 481.28 × 166.60
  4. Step 4: Simplify right side
    320.75x = 80,180.46
  5. Step 5: Solve for x
    x = 80,180.46/320.75
  6. Step 6: Final answer
    x = 249.98

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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.