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Finding the Fourth Proportional to 404.48, 606.19 and 221.48

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Solution

The fourth proportional to 404.48, 606.19 and 221.48 is: 331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.48 : 606.19 = 221.48 : x
  2. Step 2: Convert to fraction form
    404.48/606.19 = 221.48/x
  3. Step 3: Cross multiply
    404.48x = 606.19 × 221.48
  4. Step 4: Simplify right side
    404.48x = 134,254.82
  5. Step 5: Solve for x
    x = 134,254.82/404.48
  6. Step 6: Final answer
    x = 331.92

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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.