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Finding the Fourth Proportional to 422.89, 583.61 and 236.38

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Solution

The fourth proportional to 422.89, 583.61 and 236.38 is: 326.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.89 : 583.61 = 236.38 : x
  2. Step 2: Convert to fraction form
    422.89/583.61 = 236.38/x
  3. Step 3: Cross multiply
    422.89x = 583.61 × 236.38
  4. Step 4: Simplify right side
    422.89x = 137,953.73
  5. Step 5: Solve for x
    x = 137,953.73/422.89
  6. Step 6: Final answer
    x = 326.22

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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.