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Finding the Fourth Proportional to 221.95, 334.92 and 213.91

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Solution

The fourth proportional to 221.95, 334.92 and 213.91 is: 322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.95 : 334.92 = 213.91 : x
  2. Step 2: Convert to fraction form
    221.95/334.92 = 213.91/x
  3. Step 3: Cross multiply
    221.95x = 334.92 × 213.91
  4. Step 4: Simplify right side
    221.95x = 71,642.74
  5. Step 5: Solve for x
    x = 71,642.74/221.95
  6. Step 6: Final answer
    x = 322.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.