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Finding the Fourth Proportional to 381.49, 572.22 and 107.57

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Solution

The fourth proportional to 381.49, 572.22 and 107.57 is: 161.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.49 : 572.22 = 107.57 : x
  2. Step 2: Convert to fraction form
    381.49/572.22 = 107.57/x
  3. Step 3: Cross multiply
    381.49x = 572.22 × 107.57
  4. Step 4: Simplify right side
    381.49x = 61,553.17
  5. Step 5: Solve for x
    x = 61,553.17/381.49
  6. Step 6: Final answer
    x = 161.35

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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.