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Finding the Fourth Proportional to 605.72, 908.64 and 281.18

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Solution

The fourth proportional to 605.72, 908.64 and 281.18 is: 421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.72 : 908.64 = 281.18 : x
  2. Step 2: Convert to fraction form
    605.72/908.64 = 281.18/x
  3. Step 3: Cross multiply
    605.72x = 908.64 × 281.18
  4. Step 4: Simplify right side
    605.72x = 255,491.40
  5. Step 5: Solve for x
    x = 255,491.40/605.72
  6. Step 6: Final answer
    x = 421.80

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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.