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Finding the Fourth Proportional to 269.75, 372.28 and 153.34

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Solution

The fourth proportional to 269.75, 372.28 and 153.34 is: 211.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.75 : 372.28 = 153.34 : x
  2. Step 2: Convert to fraction form
    269.75/372.28 = 153.34/x
  3. Step 3: Cross multiply
    269.75x = 372.28 × 153.34
  4. Step 4: Simplify right side
    269.75x = 57,085.42
  5. Step 5: Solve for x
    x = 57,085.42/269.75
  6. Step 6: Final answer
    x = 211.62

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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.