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Finding the Fourth Proportional to 399.29, 550.88 and 268.39

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Solution

The fourth proportional to 399.29, 550.88 and 268.39 is: 370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.29 : 550.88 = 268.39 : x
  2. Step 2: Convert to fraction form
    399.29/550.88 = 268.39/x
  3. Step 3: Cross multiply
    399.29x = 550.88 × 268.39
  4. Step 4: Simplify right side
    399.29x = 147,847.96
  5. Step 5: Solve for x
    x = 147,847.96/399.29
  6. Step 6: Final answer
    x = 370.27

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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.