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Finding the Fourth Proportional to 276.79, 381.95 and 160.35

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Solution

The fourth proportional to 276.79, 381.95 and 160.35 is: 221.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.79 : 381.95 = 160.35 : x
  2. Step 2: Convert to fraction form
    276.79/381.95 = 160.35/x
  3. Step 3: Cross multiply
    276.79x = 381.95 × 160.35
  4. Step 4: Simplify right side
    276.79x = 61,245.68
  5. Step 5: Solve for x
    x = 61,245.68/276.79
  6. Step 6: Final answer
    x = 221.27

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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.