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Finding the Fourth Proportional to 329.67, 454.71 and 219.11

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Solution

The fourth proportional to 329.67, 454.71 and 219.11 is: 302.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.67 : 454.71 = 219.11 : x
  2. Step 2: Convert to fraction form
    329.67/454.71 = 219.11/x
  3. Step 3: Cross multiply
    329.67x = 454.71 × 219.11
  4. Step 4: Simplify right side
    329.67x = 99,630.06
  5. Step 5: Solve for x
    x = 99,630.06/329.67
  6. Step 6: Final answer
    x = 302.21

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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.