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Finding the Fourth Proportional to 605.64, 834.80 and 408.81

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Solution

The fourth proportional to 605.64, 834.80 and 408.81 is: 563.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.64 : 834.80 = 408.81 : x
  2. Step 2: Convert to fraction form
    605.64/834.80 = 408.81/x
  3. Step 3: Cross multiply
    605.64x = 834.80 × 408.81
  4. Step 4: Simplify right side
    605.64x = 341,272.54
  5. Step 5: Solve for x
    x = 341,272.54/605.64
  6. Step 6: Final answer
    x = 563.49

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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.