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Finding the Fourth Proportional to 408.93, 613.43 and 165.42

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Solution

The fourth proportional to 408.93, 613.43 and 165.42 is: 248.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.93 : 613.43 = 165.42 : x
  2. Step 2: Convert to fraction form
    408.93/613.43 = 165.42/x
  3. Step 3: Cross multiply
    408.93x = 613.43 × 165.42
  4. Step 4: Simplify right side
    408.93x = 101,473.59
  5. Step 5: Solve for x
    x = 101,473.59/408.93
  6. Step 6: Final answer
    x = 248.14

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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.