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Finding the Fourth Proportional to 404.22, 605.88 and 221.70

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Solution

The fourth proportional to 404.22, 605.88 and 221.70 is: 332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.22 : 605.88 = 221.70 : x
  2. Step 2: Convert to fraction form
    404.22/605.88 = 221.70/x
  3. Step 3: Cross multiply
    404.22x = 605.88 × 221.70
  4. Step 4: Simplify right side
    404.22x = 134,323.60
  5. Step 5: Solve for x
    x = 134,323.60/404.22
  6. Step 6: Final answer
    x = 332.30

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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.