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Finding the Fourth Proportional to 408.66, 613.05 and 134.82

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Solution

The fourth proportional to 408.66, 613.05 and 134.82 is: 202.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.66 : 613.05 = 134.82 : x
  2. Step 2: Convert to fraction form
    408.66/613.05 = 134.82/x
  3. Step 3: Cross multiply
    408.66x = 613.05 × 134.82
  4. Step 4: Simplify right side
    408.66x = 82,651.40
  5. Step 5: Solve for x
    x = 82,651.40/408.66
  6. Step 6: Final answer
    x = 202.25

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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.