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Finding the Fourth Proportional to 330.97, 496.57 and 221.72

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Solution

The fourth proportional to 330.97, 496.57 and 221.72 is: 332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.97 : 496.57 = 221.72 : x
  2. Step 2: Convert to fraction form
    330.97/496.57 = 221.72/x
  3. Step 3: Cross multiply
    330.97x = 496.57 × 221.72
  4. Step 4: Simplify right side
    330.97x = 110,099.50
  5. Step 5: Solve for x
    x = 110,099.50/330.97
  6. Step 6: Final answer
    x = 332.66

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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.