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Finding the Fourth Proportional to 276.96, 381.96 and 210.48

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Solution

The fourth proportional to 276.96, 381.96 and 210.48 is: 290.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.96 : 381.96 = 210.48 : x
  2. Step 2: Convert to fraction form
    276.96/381.96 = 210.48/x
  3. Step 3: Cross multiply
    276.96x = 381.96 × 210.48
  4. Step 4: Simplify right side
    276.96x = 80,394.94
  5. Step 5: Solve for x
    x = 80,394.94/276.96
  6. Step 6: Final answer
    x = 290.28

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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.