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Finding the Fourth Proportional to 399.36, 550.08 and 372.48

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Solution

The fourth proportional to 399.36, 550.08 and 372.48 is: 513.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.36 : 550.08 = 372.48 : x
  2. Step 2: Convert to fraction form
    399.36/550.08 = 372.48/x
  3. Step 3: Cross multiply
    399.36x = 550.08 × 372.48
  4. Step 4: Simplify right side
    399.36x = 204,893.80
  5. Step 5: Solve for x
    x = 204,893.80/399.36
  6. Step 6: Final answer
    x = 513.06

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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.