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Finding the Fourth Proportional to 381.98, 573.18 and 165.57

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Solution

The fourth proportional to 381.98, 573.18 and 165.57 is: 248.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.98 : 573.18 = 165.57 : x
  2. Step 2: Convert to fraction form
    381.98/573.18 = 165.57/x
  3. Step 3: Cross multiply
    381.98x = 573.18 × 165.57
  4. Step 4: Simplify right side
    381.98x = 94,901.41
  5. Step 5: Solve for x
    x = 94,901.41/381.98
  6. Step 6: Final answer
    x = 248.45

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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.