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Finding the Fourth Proportional to 606.25, 908.90 and 281.85

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Solution

The fourth proportional to 606.25, 908.90 and 281.85 is: 422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.25 : 908.90 = 281.85 : x
  2. Step 2: Convert to fraction form
    606.25/908.90 = 281.85/x
  3. Step 3: Cross multiply
    606.25x = 908.90 × 281.85
  4. Step 4: Simplify right side
    606.25x = 256,173.47
  5. Step 5: Solve for x
    x = 256,173.47/606.25
  6. Step 6: Final answer
    x = 422.55

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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.