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Finding the Fourth Proportional to 382.87, 528.38 and 225.51

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Solution

The fourth proportional to 382.87, 528.38 and 225.51 is: 311.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.87 : 528.38 = 225.51 : x
  2. Step 2: Convert to fraction form
    382.87/528.38 = 225.51/x
  3. Step 3: Cross multiply
    382.87x = 528.38 × 225.51
  4. Step 4: Simplify right side
    382.87x = 119,154.97
  5. Step 5: Solve for x
    x = 119,154.97/382.87
  6. Step 6: Final answer
    x = 311.22

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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.