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Finding the Fourth Proportional to 179.81, 269.24 and 145.49

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Solution

The fourth proportional to 179.81, 269.24 and 145.49 is: 217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.81 : 269.24 = 145.49 : x
  2. Step 2: Convert to fraction form
    179.81/269.24 = 145.49/x
  3. Step 3: Cross multiply
    179.81x = 269.24 × 145.49
  4. Step 4: Simplify right side
    179.81x = 39,169.65
  5. Step 5: Solve for x
    x = 39,169.65/179.81
  6. Step 6: Final answer
    x = 217.85

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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.