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Finding the Fourth Proportional to 403.62, 605.50 and 221.04

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Solution

The fourth proportional to 403.62, 605.50 and 221.04 is: 331.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.62 : 605.50 = 221.04 : x
  2. Step 2: Convert to fraction form
    403.62/605.50 = 221.04/x
  3. Step 3: Cross multiply
    403.62x = 605.50 × 221.04
  4. Step 4: Simplify right side
    403.62x = 133,839.72
  5. Step 5: Solve for x
    x = 133,839.72/403.62
  6. Step 6: Final answer
    x = 331.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.