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Finding the Fourth Proportional to 404.43, 606.92 and 209.49

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Solution

The fourth proportional to 404.43, 606.92 and 209.49 is: 314.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.43 : 606.92 = 209.49 : x
  2. Step 2: Convert to fraction form
    404.43/606.92 = 209.49/x
  3. Step 3: Cross multiply
    404.43x = 606.92 × 209.49
  4. Step 4: Simplify right side
    404.43x = 127,142.62
  5. Step 5: Solve for x
    x = 127,142.62/404.43
  6. Step 6: Final answer
    x = 314.37

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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.