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Finding the Fourth Proportional to 388.10, 581.39 and 225.44

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Solution

The fourth proportional to 388.10, 581.39 and 225.44 is: 337.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.10 : 581.39 = 225.44 : x
  2. Step 2: Convert to fraction form
    388.10/581.39 = 225.44/x
  3. Step 3: Cross multiply
    388.10x = 581.39 × 225.44
  4. Step 4: Simplify right side
    388.10x = 131,065.98
  5. Step 5: Solve for x
    x = 131,065.98/388.10
  6. Step 6: Final answer
    x = 337.71

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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.