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Finding the Fourth Proportional to 258.57, 356.64 and 160.38

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Solution

The fourth proportional to 258.57, 356.64 and 160.38 is: 221.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.57 : 356.64 = 160.38 : x
  2. Step 2: Convert to fraction form
    258.57/356.64 = 160.38/x
  3. Step 3: Cross multiply
    258.57x = 356.64 × 160.38
  4. Step 4: Simplify right side
    258.57x = 57,197.92
  5. Step 5: Solve for x
    x = 57,197.92/258.57
  6. Step 6: Final answer
    x = 221.21

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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.