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Finding the Fourth Proportional to 276.17, 381.27 and 213.89

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Solution

The fourth proportional to 276.17, 381.27 and 213.89 is: 295.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.17 : 381.27 = 213.89 : x
  2. Step 2: Convert to fraction form
    276.17/381.27 = 213.89/x
  3. Step 3: Cross multiply
    276.17x = 381.27 × 213.89
  4. Step 4: Simplify right side
    276.17x = 81,547.93
  5. Step 5: Solve for x
    x = 81,547.93/276.17
  6. Step 6: Final answer
    x = 295.29

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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.