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Finding the Fourth Proportional to 422.70, 634.20 and 179.30

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Solution

The fourth proportional to 422.70, 634.20 and 179.30 is: 269.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.70 : 634.20 = 179.30 : x
  2. Step 2: Convert to fraction form
    422.70/634.20 = 179.30/x
  3. Step 3: Cross multiply
    422.70x = 634.20 × 179.30
  4. Step 4: Simplify right side
    422.70x = 113,712.06
  5. Step 5: Solve for x
    x = 113,712.06/422.70
  6. Step 6: Final answer
    x = 269.01

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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.