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Finding the Fourth Proportional to 404.61, 606.92 and 221.96

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Solution

The fourth proportional to 404.61, 606.92 and 221.96 is: 332.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.61 : 606.92 = 221.96 : x
  2. Step 2: Convert to fraction form
    404.61/606.92 = 221.96/x
  3. Step 3: Cross multiply
    404.61x = 606.92 × 221.96
  4. Step 4: Simplify right side
    404.61x = 134,707.82
  5. Step 5: Solve for x
    x = 134,707.82/404.61
  6. Step 6: Final answer
    x = 332.93

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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.