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Finding the Fourth Proportional to 363.96, 502.50 and 279.78

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Solution

The fourth proportional to 363.96, 502.50 and 279.78 is: 386.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.96 : 502.50 = 279.78 : x
  2. Step 2: Convert to fraction form
    363.96/502.50 = 279.78/x
  3. Step 3: Cross multiply
    363.96x = 502.50 × 279.78
  4. Step 4: Simplify right side
    363.96x = 140,589.45
  5. Step 5: Solve for x
    x = 140,589.45/363.96
  6. Step 6: Final answer
    x = 386.28

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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.