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Finding the Fourth Proportional to 179.40, 269.41 and 139.11

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Solution

The fourth proportional to 179.40, 269.41 and 139.11 is: 208.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.40 : 269.41 = 139.11 : x
  2. Step 2: Convert to fraction form
    179.40/269.41 = 139.11/x
  3. Step 3: Cross multiply
    179.40x = 269.41 × 139.11
  4. Step 4: Simplify right side
    179.40x = 37,477.63
  5. Step 5: Solve for x
    x = 37,477.63/179.40
  6. Step 6: Final answer
    x = 208.91

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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.