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Finding the Fourth Proportional to 276.24, 414.38 and 139.26

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Solution

The fourth proportional to 276.24, 414.38 and 139.26 is: 208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.24 : 414.38 = 139.26 : x
  2. Step 2: Convert to fraction form
    276.24/414.38 = 139.26/x
  3. Step 3: Cross multiply
    276.24x = 414.38 × 139.26
  4. Step 4: Simplify right side
    276.24x = 57,706.56
  5. Step 5: Solve for x
    x = 57,706.56/276.24
  6. Step 6: Final answer
    x = 208.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.