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Finding the Fourth Proportional to 454.05, 680.95 and 219.55

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Solution

The fourth proportional to 454.05, 680.95 and 219.55 is: 329.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.05 : 680.95 = 219.55 : x
  2. Step 2: Convert to fraction form
    454.05/680.95 = 219.55/x
  3. Step 3: Cross multiply
    454.05x = 680.95 × 219.55
  4. Step 4: Simplify right side
    454.05x = 149,502.57
  5. Step 5: Solve for x
    x = 149,502.57/454.05
  6. Step 6: Final answer
    x = 329.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.