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Finding the Fourth Proportional to 276.53, 381.63 and 189.23

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Solution

The fourth proportional to 276.53, 381.63 and 189.23 is: 261.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.53 : 381.63 = 189.23 : x
  2. Step 2: Convert to fraction form
    276.53/381.63 = 189.23/x
  3. Step 3: Cross multiply
    276.53x = 381.63 × 189.23
  4. Step 4: Simplify right side
    276.53x = 72,215.84
  5. Step 5: Solve for x
    x = 72,215.84/276.53
  6. Step 6: Final answer
    x = 261.15

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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.