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Finding the Fourth Proportional to 422.56, 634.56 and 314.56

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Solution

The fourth proportional to 422.56, 634.56 and 314.56 is: 472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.56 : 634.56 = 314.56 : x
  2. Step 2: Convert to fraction form
    422.56/634.56 = 314.56/x
  3. Step 3: Cross multiply
    422.56x = 634.56 × 314.56
  4. Step 4: Simplify right side
    422.56x = 199,607.19
  5. Step 5: Solve for x
    x = 199,607.19/422.56
  6. Step 6: Final answer
    x = 472.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.