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Finding the Fourth Proportional to 388.11, 582.26 and 225.65

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Solution

The fourth proportional to 388.11, 582.26 and 225.65 is: 338.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.11 : 582.26 = 225.65 : x
  2. Step 2: Convert to fraction form
    388.11/582.26 = 225.65/x
  3. Step 3: Cross multiply
    388.11x = 582.26 × 225.65
  4. Step 4: Simplify right side
    388.11x = 131,388.99
  5. Step 5: Solve for x
    x = 131,388.99/388.11
  6. Step 6: Final answer
    x = 338.54

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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.