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Finding the Fourth Proportional to 605.30, 908.09 and 215.33

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Solution

The fourth proportional to 605.30, 908.09 and 215.33 is: 323.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.30 : 908.09 = 215.33 : x
  2. Step 2: Convert to fraction form
    605.30/908.09 = 215.33/x
  3. Step 3: Cross multiply
    605.30x = 908.09 × 215.33
  4. Step 4: Simplify right side
    605.30x = 195,540.21
  5. Step 5: Solve for x
    x = 195,540.21/605.30
  6. Step 6: Final answer
    x = 323.05

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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.