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Finding the Fourth Proportional to 422.56, 583.08 and 267.28

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Solution

The fourth proportional to 422.56, 583.08 and 267.28 is: 368.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.56 : 583.08 = 267.28 : x
  2. Step 2: Convert to fraction form
    422.56/583.08 = 267.28/x
  3. Step 3: Cross multiply
    422.56x = 583.08 × 267.28
  4. Step 4: Simplify right side
    422.56x = 155,845.62
  5. Step 5: Solve for x
    x = 155,845.62/422.56
  6. Step 6: Final answer
    x = 368.81

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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.