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Finding the Fourth Proportional to 329.44, 454.85 and 211.47

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Solution

The fourth proportional to 329.44, 454.85 and 211.47 is: 291.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.44 : 454.85 = 211.47 : x
  2. Step 2: Convert to fraction form
    329.44/454.85 = 211.47/x
  3. Step 3: Cross multiply
    329.44x = 454.85 × 211.47
  4. Step 4: Simplify right side
    329.44x = 96,185.50
  5. Step 5: Solve for x
    x = 96,185.50/329.44
  6. Step 6: Final answer
    x = 291.96

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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.