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Finding the Fourth Proportional to 497.12, 686.16 and 331.27

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Solution

The fourth proportional to 497.12, 686.16 and 331.27 is: 457.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.12 : 686.16 = 331.27 : x
  2. Step 2: Convert to fraction form
    497.12/686.16 = 331.27/x
  3. Step 3: Cross multiply
    497.12x = 686.16 × 331.27
  4. Step 4: Simplify right side
    497.12x = 227,299.14
  5. Step 5: Solve for x
    x = 227,299.14/497.12
  6. Step 6: Final answer
    x = 457.24

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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.