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Finding the Fourth Proportional to 382.76, 528.12 and 225.44

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Solution

The fourth proportional to 382.76, 528.12 and 225.44 is: 311.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.76 : 528.12 = 225.44 : x
  2. Step 2: Convert to fraction form
    382.76/528.12 = 225.44/x
  3. Step 3: Cross multiply
    382.76x = 528.12 × 225.44
  4. Step 4: Simplify right side
    382.76x = 119,059.37
  5. Step 5: Solve for x
    x = 119,059.37/382.76
  6. Step 6: Final answer
    x = 311.05

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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.