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Finding the Fourth Proportional to 399.89, 550.72 and 363.17

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Solution

The fourth proportional to 399.89, 550.72 and 363.17 is: 500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.89 : 550.72 = 363.17 : x
  2. Step 2: Convert to fraction form
    399.89/550.72 = 363.17/x
  3. Step 3: Cross multiply
    399.89x = 550.72 × 363.17
  4. Step 4: Simplify right side
    399.89x = 200,004.98
  5. Step 5: Solve for x
    x = 200,004.98/399.89
  6. Step 6: Final answer
    x = 500.15

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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.