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Finding the Fourth Proportional to 422.98, 634.32 and 162.85

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Solution

The fourth proportional to 422.98, 634.32 and 162.85 is: 244.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.98 : 634.32 = 162.85 : x
  2. Step 2: Convert to fraction form
    422.98/634.32 = 162.85/x
  3. Step 3: Cross multiply
    422.98x = 634.32 × 162.85
  4. Step 4: Simplify right side
    422.98x = 103,298.31
  5. Step 5: Solve for x
    x = 103,298.31/422.98
  6. Step 6: Final answer
    x = 244.21

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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.