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Finding the Fourth Proportional to 260.43, 358.61 and 225.40

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Solution

The fourth proportional to 260.43, 358.61 and 225.40 is: 310.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.43 : 358.61 = 225.40 : x
  2. Step 2: Convert to fraction form
    260.43/358.61 = 225.40/x
  3. Step 3: Cross multiply
    260.43x = 358.61 × 225.40
  4. Step 4: Simplify right side
    260.43x = 80,830.69
  5. Step 5: Solve for x
    x = 80,830.69/260.43
  6. Step 6: Final answer
    x = 310.37

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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.