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Finding the Fourth Proportional to 422.63, 582.68 and 275.21

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Solution

The fourth proportional to 422.63, 582.68 and 275.21 is: 379.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.63 : 582.68 = 275.21 : x
  2. Step 2: Convert to fraction form
    422.63/582.68 = 275.21/x
  3. Step 3: Cross multiply
    422.63x = 582.68 × 275.21
  4. Step 4: Simplify right side
    422.63x = 160,359.44
  5. Step 5: Solve for x
    x = 160,359.44/422.63
  6. Step 6: Final answer
    x = 379.43

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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.