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Finding the Fourth Proportional to 276.37, 381.15 and 210.97

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Solution

The fourth proportional to 276.37, 381.15 and 210.97 is: 290.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.37 : 381.15 = 210.97 : x
  2. Step 2: Convert to fraction form
    276.37/381.15 = 210.97/x
  3. Step 3: Cross multiply
    276.37x = 381.15 × 210.97
  4. Step 4: Simplify right side
    276.37x = 80,411.22
  5. Step 5: Solve for x
    x = 80,411.22/276.37
  6. Step 6: Final answer
    x = 290.95

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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.