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Finding the Fourth Proportional to 382.51, 527.81 and 225.12

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Solution

The fourth proportional to 382.51, 527.81 and 225.12 is: 310.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.51 : 527.81 = 225.12 : x
  2. Step 2: Convert to fraction form
    382.51/527.81 = 225.12/x
  3. Step 3: Cross multiply
    382.51x = 527.81 × 225.12
  4. Step 4: Simplify right side
    382.51x = 118,820.59
  5. Step 5: Solve for x
    x = 118,820.59/382.51
  6. Step 6: Final answer
    x = 310.63

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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.