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Finding the Fourth Proportional to 258.55, 356.94 and 171.37

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Solution

The fourth proportional to 258.55, 356.94 and 171.37 is: 236.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.55 : 356.94 = 171.37 : x
  2. Step 2: Convert to fraction form
    258.55/356.94 = 171.37/x
  3. Step 3: Cross multiply
    258.55x = 356.94 × 171.37
  4. Step 4: Simplify right side
    258.55x = 61,168.81
  5. Step 5: Solve for x
    x = 61,168.81/258.55
  6. Step 6: Final answer
    x = 236.58

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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.