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Finding the Fourth Proportional to 258.35, 356.36 and 165.06

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Solution

The fourth proportional to 258.35, 356.36 and 165.06 is: 227.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.35 : 356.36 = 165.06 : x
  2. Step 2: Convert to fraction form
    258.35/356.36 = 165.06/x
  3. Step 3: Cross multiply
    258.35x = 356.36 × 165.06
  4. Step 4: Simplify right side
    258.35x = 58,820.78
  5. Step 5: Solve for x
    x = 58,820.78/258.35
  6. Step 6: Final answer
    x = 227.68

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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.