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Finding the Fourth Proportional to 403.62, 553.36 and 396.33

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Solution

The fourth proportional to 403.62, 553.36 and 396.33 is: 543.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.62 : 553.36 = 396.33 : x
  2. Step 2: Convert to fraction form
    403.62/553.36 = 396.33/x
  3. Step 3: Cross multiply
    403.62x = 553.36 × 396.33
  4. Step 4: Simplify right side
    403.62x = 219,311.59
  5. Step 5: Solve for x
    x = 219,311.59/403.62
  6. Step 6: Final answer
    x = 543.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.