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Finding the Fourth Proportional to 382.92, 528.30 and 225.52

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Solution

The fourth proportional to 382.92, 528.30 and 225.52 is: 311.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.92 : 528.30 = 225.52 : x
  2. Step 2: Convert to fraction form
    382.92/528.30 = 225.52/x
  3. Step 3: Cross multiply
    382.92x = 528.30 × 225.52
  4. Step 4: Simplify right side
    382.92x = 119,142.22
  5. Step 5: Solve for x
    x = 119,142.22/382.92
  6. Step 6: Final answer
    x = 311.14

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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.