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Finding the Fourth Proportional to 331.98, 458.18 and 207.68

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Solution

The fourth proportional to 331.98, 458.18 and 207.68 is: 286.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.98 : 458.18 = 207.68 : x
  2. Step 2: Convert to fraction form
    331.98/458.18 = 207.68/x
  3. Step 3: Cross multiply
    331.98x = 458.18 × 207.68
  4. Step 4: Simplify right side
    331.98x = 95,151.49
  5. Step 5: Solve for x
    x = 95,151.49/331.98
  6. Step 6: Final answer
    x = 286.62

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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.