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Finding the Fourth Proportional to 408.64, 613.08 and 192.28

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Solution

The fourth proportional to 408.64, 613.08 and 192.28 is: 288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.64 : 613.08 = 192.28 : x
  2. Step 2: Convert to fraction form
    408.64/613.08 = 192.28/x
  3. Step 3: Cross multiply
    408.64x = 613.08 × 192.28
  4. Step 4: Simplify right side
    408.64x = 117,883.02
  5. Step 5: Solve for x
    x = 117,883.02/408.64
  6. Step 6: Final answer
    x = 288.48

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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.