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Finding the Fourth Proportional to 258.52, 356.92 and 165.28

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Solution

The fourth proportional to 258.52, 356.92 and 165.28 is: 228.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.52 : 356.92 = 165.28 : x
  2. Step 2: Convert to fraction form
    258.52/356.92 = 165.28/x
  3. Step 3: Cross multiply
    258.52x = 356.92 × 165.28
  4. Step 4: Simplify right side
    258.52x = 58,991.74
  5. Step 5: Solve for x
    x = 58,991.74/258.52
  6. Step 6: Final answer
    x = 228.19

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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.