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Finding the Fourth Proportional to 422.56, 583.60 and 330.48

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Solution

The fourth proportional to 422.56, 583.60 and 330.48 is: 456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.56 : 583.60 = 330.48 : x
  2. Step 2: Convert to fraction form
    422.56/583.60 = 330.48/x
  3. Step 3: Cross multiply
    422.56x = 583.60 × 330.48
  4. Step 4: Simplify right side
    422.56x = 192,868.13
  5. Step 5: Solve for x
    x = 192,868.13/422.56
  6. Step 6: Final answer
    x = 456.43

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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.