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Finding the Fourth Proportional to 329.20, 454.21 and 223.05

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Solution

The fourth proportional to 329.20, 454.21 and 223.05 is: 307.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.20 : 454.21 = 223.05 : x
  2. Step 2: Convert to fraction form
    329.20/454.21 = 223.05/x
  3. Step 3: Cross multiply
    329.20x = 454.21 × 223.05
  4. Step 4: Simplify right side
    329.20x = 101,313.23
  5. Step 5: Solve for x
    x = 101,313.23/329.20
  6. Step 6: Final answer
    x = 307.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.