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Finding the Fourth Proportional to 269.88, 371.28 and 211.56

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Solution

The fourth proportional to 269.88, 371.28 and 211.56 is: 291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.88 : 371.28 = 211.56 : x
  2. Step 2: Convert to fraction form
    269.88/371.28 = 211.56/x
  3. Step 3: Cross multiply
    269.88x = 371.28 × 211.56
  4. Step 4: Simplify right side
    269.88x = 78,548.00
  5. Step 5: Solve for x
    x = 78,548.00/269.88
  6. Step 6: Final answer
    x = 291.05

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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.