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Finding the Fourth Proportional to 422.80, 582.96 and 352.96

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Solution

The fourth proportional to 422.80, 582.96 and 352.96 is: 486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.80 : 582.96 = 352.96 : x
  2. Step 2: Convert to fraction form
    422.80/582.96 = 352.96/x
  3. Step 3: Cross multiply
    422.80x = 582.96 × 352.96
  4. Step 4: Simplify right side
    422.80x = 205,761.56
  5. Step 5: Solve for x
    x = 205,761.56/422.80
  6. Step 6: Final answer
    x = 486.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.