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Finding the Fourth Proportional to 381.97, 573.36 and 165.70

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Solution

The fourth proportional to 381.97, 573.36 and 165.70 is: 248.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.97 : 573.36 = 165.70 : x
  2. Step 2: Convert to fraction form
    381.97/573.36 = 165.70/x
  3. Step 3: Cross multiply
    381.97x = 573.36 × 165.70
  4. Step 4: Simplify right side
    381.97x = 95,002.06
  5. Step 5: Solve for x
    x = 95,002.06/381.97
  6. Step 6: Final answer
    x = 248.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.