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Finding the Fourth Proportional to 422.12, 582.66 and 247.44

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Solution

The fourth proportional to 422.12, 582.66 and 247.44 is: 341.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.12 : 582.66 = 247.44 : x
  2. Step 2: Convert to fraction form
    422.12/582.66 = 247.44/x
  3. Step 3: Cross multiply
    422.12x = 582.66 × 247.44
  4. Step 4: Simplify right side
    422.12x = 144,173.39
  5. Step 5: Solve for x
    x = 144,173.39/422.12
  6. Step 6: Final answer
    x = 341.55

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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.