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Finding the Fourth Proportional to 381.12, 571.37 and 164.45

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Solution

The fourth proportional to 381.12, 571.37 and 164.45 is: 246.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.12 : 571.37 = 164.45 : x
  2. Step 2: Convert to fraction form
    381.12/571.37 = 164.45/x
  3. Step 3: Cross multiply
    381.12x = 571.37 × 164.45
  4. Step 4: Simplify right side
    381.12x = 93,958.12
  5. Step 5: Solve for x
    x = 93,958.12/381.12
  6. Step 6: Final answer
    x = 246.53

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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.