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Finding the Fourth Proportional to 255.13, 351.30 and 225.97

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Solution

The fourth proportional to 255.13, 351.30 and 225.97 is: 311.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.13 : 351.30 = 225.97 : x
  2. Step 2: Convert to fraction form
    255.13/351.30 = 225.97/x
  3. Step 3: Cross multiply
    255.13x = 351.30 × 225.97
  4. Step 4: Simplify right side
    255.13x = 79,383.26
  5. Step 5: Solve for x
    x = 79,383.26/255.13
  6. Step 6: Final answer
    x = 311.15

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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.