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Finding the Fourth Proportional to 497.75, 687 and 331.97

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Solution

The fourth proportional to 497.75, 687 and 331.97 is: 458.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.75 : 687 = 331.97 : x
  2. Step 2: Convert to fraction form
    497.75/687 = 331.97/x
  3. Step 3: Cross multiply
    497.75x = 687 × 331.97
  4. Step 4: Simplify right side
    497.75x = 228,059.96
  5. Step 5: Solve for x
    x = 228,059.96/497.75
  6. Step 6: Final answer
    x = 458.19

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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.