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Finding the Fourth Proportional to 329.54, 454.78 and 219.06

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Solution

The fourth proportional to 329.54, 454.78 and 219.06 is: 302.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.54 : 454.78 = 219.06 : x
  2. Step 2: Convert to fraction form
    329.54/454.78 = 219.06/x
  3. Step 3: Cross multiply
    329.54x = 454.78 × 219.06
  4. Step 4: Simplify right side
    329.54x = 99,624.11
  5. Step 5: Solve for x
    x = 99,624.11/329.54
  6. Step 6: Final answer
    x = 302.31

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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.