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Finding the Fourth Proportional to 299.25, 412.79 and 225.54

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Solution

The fourth proportional to 299.25, 412.79 and 225.54 is: 311.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.25 : 412.79 = 225.54 : x
  2. Step 2: Convert to fraction form
    299.25/412.79 = 225.54/x
  3. Step 3: Cross multiply
    299.25x = 412.79 × 225.54
  4. Step 4: Simplify right side
    299.25x = 93,099.53
  5. Step 5: Solve for x
    x = 93,099.53/299.25
  6. Step 6: Final answer
    x = 311.11

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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.