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Finding the Fourth Proportional to 169.46, 255.21 and 143.95

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Solution

The fourth proportional to 169.46, 255.21 and 143.95 is: 216.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.46 : 255.21 = 143.95 : x
  2. Step 2: Convert to fraction form
    169.46/255.21 = 143.95/x
  3. Step 3: Cross multiply
    169.46x = 255.21 × 143.95
  4. Step 4: Simplify right side
    169.46x = 36,737.48
  5. Step 5: Solve for x
    x = 36,737.48/169.46
  6. Step 6: Final answer
    x = 216.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.