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Finding the Fourth Proportional to 605.21, 908.11 and 280.53

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Solution

The fourth proportional to 605.21, 908.11 and 280.53 is: 420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.21 : 908.11 = 280.53 : x
  2. Step 2: Convert to fraction form
    605.21/908.11 = 280.53/x
  3. Step 3: Cross multiply
    605.21x = 908.11 × 280.53
  4. Step 4: Simplify right side
    605.21x = 254,752.45
  5. Step 5: Solve for x
    x = 254,752.45/605.21
  6. Step 6: Final answer
    x = 420.94

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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.