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Finding the Fourth Proportional to 268.88, 371.28 and 213.56

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Solution

The fourth proportional to 268.88, 371.28 and 213.56 is: 294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.88 : 371.28 = 213.56 : x
  2. Step 2: Convert to fraction form
    268.88/371.28 = 213.56/x
  3. Step 3: Cross multiply
    268.88x = 371.28 × 213.56
  4. Step 4: Simplify right side
    268.88x = 79,290.56
  5. Step 5: Solve for x
    x = 79,290.56/268.88
  6. Step 6: Final answer
    x = 294.89

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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.