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Finding the Fourth Proportional to 218.46, 300.78 and 179.19

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Solution

The fourth proportional to 218.46, 300.78 and 179.19 is: 246.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.46 : 300.78 = 179.19 : x
  2. Step 2: Convert to fraction form
    218.46/300.78 = 179.19/x
  3. Step 3: Cross multiply
    218.46x = 300.78 × 179.19
  4. Step 4: Simplify right side
    218.46x = 53,896.77
  5. Step 5: Solve for x
    x = 53,896.77/218.46
  6. Step 6: Final answer
    x = 246.71

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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.