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Finding the Fourth Proportional to 331.67, 458.62 and 279.86

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Solution

The fourth proportional to 331.67, 458.62 and 279.86 is: 386.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.67 : 458.62 = 279.86 : x
  2. Step 2: Convert to fraction form
    331.67/458.62 = 279.86/x
  3. Step 3: Cross multiply
    331.67x = 458.62 × 279.86
  4. Step 4: Simplify right side
    331.67x = 128,346.40
  5. Step 5: Solve for x
    x = 128,346.40/331.67
  6. Step 6: Final answer
    x = 386.97

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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.