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Finding the Fourth Proportional to 252.18, 380.46 and 251.51

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Solution

The fourth proportional to 252.18, 380.46 and 251.51 is: 379.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.18 : 380.46 = 251.51 : x
  2. Step 2: Convert to fraction form
    252.18/380.46 = 251.51/x
  3. Step 3: Cross multiply
    252.18x = 380.46 × 251.51
  4. Step 4: Simplify right side
    252.18x = 95,687.59
  5. Step 5: Solve for x
    x = 95,687.59/252.18
  6. Step 6: Final answer
    x = 379.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.