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Finding the Fourth Proportional to 179.20, 270.40 and 173.20

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Solution

The fourth proportional to 179.20, 270.40 and 173.20 is: 261.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.20 : 270.40 = 173.20 : x
  2. Step 2: Convert to fraction form
    179.20/270.40 = 173.20/x
  3. Step 3: Cross multiply
    179.20x = 270.40 × 173.20
  4. Step 4: Simplify right side
    179.20x = 46,833.28
  5. Step 5: Solve for x
    x = 46,833.28/179.20
  6. Step 6: Final answer
    x = 261.35

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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.