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Finding the Fourth Proportional to 381.20, 571.70 and 150.08

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Solution

The fourth proportional to 381.20, 571.70 and 150.08 is: 225.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.20 : 571.70 = 150.08 : x
  2. Step 2: Convert to fraction form
    381.20/571.70 = 150.08/x
  3. Step 3: Cross multiply
    381.20x = 571.70 × 150.08
  4. Step 4: Simplify right side
    381.20x = 85,800.74
  5. Step 5: Solve for x
    x = 85,800.74/381.20
  6. Step 6: Final answer
    x = 225.08

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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.