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Finding the Fourth Proportional to 422.59, 582.79 and 275.27

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Solution

The fourth proportional to 422.59, 582.79 and 275.27 is: 379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.59 : 582.79 = 275.27 : x
  2. Step 2: Convert to fraction form
    422.59/582.79 = 275.27/x
  3. Step 3: Cross multiply
    422.59x = 582.79 × 275.27
  4. Step 4: Simplify right side
    422.59x = 160,424.60
  5. Step 5: Solve for x
    x = 160,424.60/422.59
  6. Step 6: Final answer
    x = 379.62

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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.