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Finding the Fourth Proportional to 179.75, 269.40 and 98.65

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Solution

The fourth proportional to 179.75, 269.40 and 98.65 is: 147.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.75 : 269.40 = 98.65 : x
  2. Step 2: Convert to fraction form
    179.75/269.40 = 98.65/x
  3. Step 3: Cross multiply
    179.75x = 269.40 × 98.65
  4. Step 4: Simplify right side
    179.75x = 26,575.14
  5. Step 5: Solve for x
    x = 26,575.14/179.75
  6. Step 6: Final answer
    x = 147.85

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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.