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Finding the Fourth Proportional to 260.81, 358.79 and 225.57

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Solution

The fourth proportional to 260.81, 358.79 and 225.57 is: 310.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.81 : 358.79 = 225.57 : x
  2. Step 2: Convert to fraction form
    260.81/358.79 = 225.57/x
  3. Step 3: Cross multiply
    260.81x = 358.79 × 225.57
  4. Step 4: Simplify right side
    260.81x = 80,932.26
  5. Step 5: Solve for x
    x = 80,932.26/260.81
  6. Step 6: Final answer
    x = 310.31

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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.