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Finding the Fourth Proportional to 252.05, 378.17 and 89.74

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Solution

The fourth proportional to 252.05, 378.17 and 89.74 is: 134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.05 : 378.17 = 89.74 : x
  2. Step 2: Convert to fraction form
    252.05/378.17 = 89.74/x
  3. Step 3: Cross multiply
    252.05x = 378.17 × 89.74
  4. Step 4: Simplify right side
    252.05x = 33,936.98
  5. Step 5: Solve for x
    x = 33,936.98/252.05
  6. Step 6: Final answer
    x = 134.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.