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Finding the Fourth Proportional to 209.08, 287.21 and 179.56

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Solution

The fourth proportional to 209.08, 287.21 and 179.56 is: 246.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.08 : 287.21 = 179.56 : x
  2. Step 2: Convert to fraction form
    209.08/287.21 = 179.56/x
  3. Step 3: Cross multiply
    209.08x = 287.21 × 179.56
  4. Step 4: Simplify right side
    209.08x = 51,571.43
  5. Step 5: Solve for x
    x = 51,571.43/209.08
  6. Step 6: Final answer
    x = 246.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.