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Finding the Fourth Proportional to 295.78, 408.38 and 185.28

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Solution

The fourth proportional to 295.78, 408.38 and 185.28 is: 255.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.78 : 408.38 = 185.28 : x
  2. Step 2: Convert to fraction form
    295.78/408.38 = 185.28/x
  3. Step 3: Cross multiply
    295.78x = 408.38 × 185.28
  4. Step 4: Simplify right side
    295.78x = 75,664.65
  5. Step 5: Solve for x
    x = 75,664.65/295.78
  6. Step 6: Final answer
    x = 255.81

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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.