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Finding the Fourth Proportional to 381.81, 527.20 and 293.15

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Solution

The fourth proportional to 381.81, 527.20 and 293.15 is: 404.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.81 : 527.20 = 293.15 : x
  2. Step 2: Convert to fraction form
    381.81/527.20 = 293.15/x
  3. Step 3: Cross multiply
    381.81x = 527.20 × 293.15
  4. Step 4: Simplify right side
    381.81x = 154,548.68
  5. Step 5: Solve for x
    x = 154,548.68/381.81
  6. Step 6: Final answer
    x = 404.78

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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.