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Finding the Fourth Proportional to 381.45, 571.81 and 176.18

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Solution

The fourth proportional to 381.45, 571.81 and 176.18 is: 264.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.45 : 571.81 = 176.18 : x
  2. Step 2: Convert to fraction form
    381.45/571.81 = 176.18/x
  3. Step 3: Cross multiply
    381.45x = 571.81 × 176.18
  4. Step 4: Simplify right side
    381.45x = 100,738.63
  5. Step 5: Solve for x
    x = 100,738.63/381.45
  6. Step 6: Final answer
    x = 264.10

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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.