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Finding the Fourth Proportional to 399.46, 550.74 and 349.46

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Solution

The fourth proportional to 399.46, 550.74 and 349.46 is: 481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.46 : 550.74 = 349.46 : x
  2. Step 2: Convert to fraction form
    399.46/550.74 = 349.46/x
  3. Step 3: Cross multiply
    399.46x = 550.74 × 349.46
  4. Step 4: Simplify right side
    399.46x = 192,461.60
  5. Step 5: Solve for x
    x = 192,461.60/399.46
  6. Step 6: Final answer
    x = 481.80

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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.