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Finding the Fourth Proportional to 604.66, 834.42 and 408.21

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Solution

The fourth proportional to 604.66, 834.42 and 408.21 is: 563.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.66 : 834.42 = 408.21 : x
  2. Step 2: Convert to fraction form
    604.66/834.42 = 408.21/x
  3. Step 3: Cross multiply
    604.66x = 834.42 × 408.21
  4. Step 4: Simplify right side
    604.66x = 340,618.59
  5. Step 5: Solve for x
    x = 340,618.59/604.66
  6. Step 6: Final answer
    x = 563.32

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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.