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Finding the Fourth Proportional to 268.90, 371.32 and 225.56

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Solution

The fourth proportional to 268.90, 371.32 and 225.56 is: 311.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.90 : 371.32 = 225.56 : x
  2. Step 2: Convert to fraction form
    268.90/371.32 = 225.56/x
  3. Step 3: Cross multiply
    268.90x = 371.32 × 225.56
  4. Step 4: Simplify right side
    268.90x = 83,754.94
  5. Step 5: Solve for x
    x = 83,754.94/268.90
  6. Step 6: Final answer
    x = 311.47

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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.