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Finding the Fourth Proportional to 400.87, 551.82 and 349.03

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Solution

The fourth proportional to 400.87, 551.82 and 349.03 is: 480.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.87 : 551.82 = 349.03 : x
  2. Step 2: Convert to fraction form
    400.87/551.82 = 349.03/x
  3. Step 3: Cross multiply
    400.87x = 551.82 × 349.03
  4. Step 4: Simplify right side
    400.87x = 192,601.73
  5. Step 5: Solve for x
    x = 192,601.73/400.87
  6. Step 6: Final answer
    x = 480.46

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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.