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Finding the Fourth Proportional to 605.18, 834.70 and 408.36

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Solution

The fourth proportional to 605.18, 834.70 and 408.36 is: 563.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.18 : 834.70 = 408.36 : x
  2. Step 2: Convert to fraction form
    605.18/834.70 = 408.36/x
  3. Step 3: Cross multiply
    605.18x = 834.70 × 408.36
  4. Step 4: Simplify right side
    605.18x = 340,858.09
  5. Step 5: Solve for x
    x = 340,858.09/605.18
  6. Step 6: Final answer
    x = 563.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.