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Finding the Fourth Proportional to 606.09, 908.96 and 221.25

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Solution

The fourth proportional to 606.09, 908.96 and 221.25 is: 331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.09 : 908.96 = 221.25 : x
  2. Step 2: Convert to fraction form
    606.09/908.96 = 221.25/x
  3. Step 3: Cross multiply
    606.09x = 908.96 × 221.25
  4. Step 4: Simplify right side
    606.09x = 201,106.29
  5. Step 5: Solve for x
    x = 201,106.29/606.09
  6. Step 6: Final answer
    x = 331.81

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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.