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Finding the Fourth Proportional to 422.45, 582.91 and 235.88

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Solution

The fourth proportional to 422.45, 582.91 and 235.88 is: 325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.45 : 582.91 = 235.88 : x
  2. Step 2: Convert to fraction form
    422.45/582.91 = 235.88/x
  3. Step 3: Cross multiply
    422.45x = 582.91 × 235.88
  4. Step 4: Simplify right side
    422.45x = 137,496.81
  5. Step 5: Solve for x
    x = 137,496.81/422.45
  6. Step 6: Final answer
    x = 325.47

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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.