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Finding the Fourth Proportional to 605.61, 908.08 and 280.58

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Solution

The fourth proportional to 605.61, 908.08 and 280.58 is: 420.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.61 : 908.08 = 280.58 : x
  2. Step 2: Convert to fraction form
    605.61/908.08 = 280.58/x
  3. Step 3: Cross multiply
    605.61x = 908.08 × 280.58
  4. Step 4: Simplify right side
    605.61x = 254,789.09
  5. Step 5: Solve for x
    x = 254,789.09/605.61
  6. Step 6: Final answer
    x = 420.71

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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.