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Finding the Fourth Proportional to 258.33, 356.46 and 154.83

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Solution

The fourth proportional to 258.33, 356.46 and 154.83 is: 213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.33 : 356.46 = 154.83 : x
  2. Step 2: Convert to fraction form
    258.33/356.46 = 154.83/x
  3. Step 3: Cross multiply
    258.33x = 356.46 × 154.83
  4. Step 4: Simplify right side
    258.33x = 55,190.70
  5. Step 5: Solve for x
    x = 55,190.70/258.33
  6. Step 6: Final answer
    x = 213.64

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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.