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Finding the Fourth Proportional to 179.21, 269.72 and 152.78

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Solution

The fourth proportional to 179.21, 269.72 and 152.78 is: 229.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.21 : 269.72 = 152.78 : x
  2. Step 2: Convert to fraction form
    179.21/269.72 = 152.78/x
  3. Step 3: Cross multiply
    179.21x = 269.72 × 152.78
  4. Step 4: Simplify right side
    179.21x = 41,206.85
  5. Step 5: Solve for x
    x = 41,206.85/179.21
  6. Step 6: Final answer
    x = 229.94

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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.