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Finding the Fourth Proportional to 221.77, 330.26 and 216.10

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Solution

The fourth proportional to 221.77, 330.26 and 216.10 is: 321.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.77 : 330.26 = 216.10 : x
  2. Step 2: Convert to fraction form
    221.77/330.26 = 216.10/x
  3. Step 3: Cross multiply
    221.77x = 330.26 × 216.10
  4. Step 4: Simplify right side
    221.77x = 71,369.19
  5. Step 5: Solve for x
    x = 71,369.19/221.77
  6. Step 6: Final answer
    x = 321.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.