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Finding the Fourth Proportional to 547.11, 754.20 and 399.51

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Solution

The fourth proportional to 547.11, 754.20 and 399.51 is: 550.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.11 : 754.20 = 399.51 : x
  2. Step 2: Convert to fraction form
    547.11/754.20 = 399.51/x
  3. Step 3: Cross multiply
    547.11x = 754.20 × 399.51
  4. Step 4: Simplify right side
    547.11x = 301,310.44
  5. Step 5: Solve for x
    x = 301,310.44/547.11
  6. Step 6: Final answer
    x = 550.73

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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.