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Finding the Fourth Proportional to 258.63, 387.60 and 226.05

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Solution

The fourth proportional to 258.63, 387.60 and 226.05 is: 338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.63 : 387.60 = 226.05 : x
  2. Step 2: Convert to fraction form
    258.63/387.60 = 226.05/x
  3. Step 3: Cross multiply
    258.63x = 387.60 × 226.05
  4. Step 4: Simplify right side
    258.63x = 87,616.98
  5. Step 5: Solve for x
    x = 87,616.98/258.63
  6. Step 6: Final answer
    x = 338.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.