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Finding the Fourth Proportional to 252.39, 378.78 and 201.49

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Solution

The fourth proportional to 252.39, 378.78 and 201.49 is: 302.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.39 : 378.78 = 201.49 : x
  2. Step 2: Convert to fraction form
    252.39/378.78 = 201.49/x
  3. Step 3: Cross multiply
    252.39x = 378.78 × 201.49
  4. Step 4: Simplify right side
    252.39x = 76,320.38
  5. Step 5: Solve for x
    x = 76,320.38/252.39
  6. Step 6: Final answer
    x = 302.39

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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.