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Finding the Fourth Proportional to 331.26, 453.82 and 318.95

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Solution

The fourth proportional to 331.26, 453.82 and 318.95 is: 436.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.26 : 453.82 = 318.95 : x
  2. Step 2: Convert to fraction form
    331.26/453.82 = 318.95/x
  3. Step 3: Cross multiply
    331.26x = 453.82 × 318.95
  4. Step 4: Simplify right side
    331.26x = 144,745.89
  5. Step 5: Solve for x
    x = 144,745.89/331.26
  6. Step 6: Final answer
    x = 436.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.