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Finding the Fourth Proportional to 258.57, 386.94 and 224.45

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Solution

The fourth proportional to 258.57, 386.94 and 224.45 is: 335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.57 : 386.94 = 224.45 : x
  2. Step 2: Convert to fraction form
    258.57/386.94 = 224.45/x
  3. Step 3: Cross multiply
    258.57x = 386.94 × 224.45
  4. Step 4: Simplify right side
    258.57x = 86,849.04
  5. Step 5: Solve for x
    x = 86,849.04/258.57
  6. Step 6: Final answer
    x = 335.88

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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.