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Finding the Fourth Proportional to 258.14, 386.94 and 149.96

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Solution

The fourth proportional to 258.14, 386.94 and 149.96 is: 224.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.14 : 386.94 = 149.96 : x
  2. Step 2: Convert to fraction form
    258.14/386.94 = 149.96/x
  3. Step 3: Cross multiply
    258.14x = 386.94 × 149.96
  4. Step 4: Simplify right side
    258.14x = 58,025.52
  5. Step 5: Solve for x
    x = 58,025.52/258.14
  6. Step 6: Final answer
    x = 224.78

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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.