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Finding the Fourth Proportional to 276.08, 414.20 and 105.20

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Solution

The fourth proportional to 276.08, 414.20 and 105.20 is: 157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.08 : 414.20 = 105.20 : x
  2. Step 2: Convert to fraction form
    276.08/414.20 = 105.20/x
  3. Step 3: Cross multiply
    276.08x = 414.20 × 105.20
  4. Step 4: Simplify right side
    276.08x = 43,573.84
  5. Step 5: Solve for x
    x = 43,573.84/276.08
  6. Step 6: Final answer
    x = 157.83

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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.