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Finding the Fourth Proportional to 258.97, 357.90 and 212.27

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Solution

The fourth proportional to 258.97, 357.90 and 212.27 is: 293.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.97 : 357.90 = 212.27 : x
  2. Step 2: Convert to fraction form
    258.97/357.90 = 212.27/x
  3. Step 3: Cross multiply
    258.97x = 357.90 × 212.27
  4. Step 4: Simplify right side
    258.97x = 75,971.53
  5. Step 5: Solve for x
    x = 75,971.53/258.97
  6. Step 6: Final answer
    x = 293.36

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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.