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Finding the Fourth Proportional to 422.22, 582.82 and 274.92

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Solution

The fourth proportional to 422.22, 582.82 and 274.92 is: 379.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.22 : 582.82 = 274.92 : x
  2. Step 2: Convert to fraction form
    422.22/582.82 = 274.92/x
  3. Step 3: Cross multiply
    422.22x = 582.82 × 274.92
  4. Step 4: Simplify right side
    422.22x = 160,228.87
  5. Step 5: Solve for x
    x = 160,228.87/422.22
  6. Step 6: Final answer
    x = 379.49

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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.