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Finding the Fourth Proportional to 422.42, 582.80 and 245.33

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Solution

The fourth proportional to 422.42, 582.80 and 245.33 is: 338.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.42 : 582.80 = 245.33 : x
  2. Step 2: Convert to fraction form
    422.42/582.80 = 245.33/x
  3. Step 3: Cross multiply
    422.42x = 582.80 × 245.33
  4. Step 4: Simplify right side
    422.42x = 142,976.37
  5. Step 5: Solve for x
    x = 142,976.37/422.42
  6. Step 6: Final answer
    x = 338.47

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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.