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Finding the Fourth Proportional to 258.57, 356.70 and 170.14

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Solution

The fourth proportional to 258.57, 356.70 and 170.14 is: 234.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.57 : 356.70 = 170.14 : x
  2. Step 2: Convert to fraction form
    258.57/356.70 = 170.14/x
  3. Step 3: Cross multiply
    258.57x = 356.70 × 170.14
  4. Step 4: Simplify right side
    258.57x = 60,688.94
  5. Step 5: Solve for x
    x = 60,688.94/258.57
  6. Step 6: Final answer
    x = 234.71

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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.