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Finding the Fourth Proportional to 381.50, 572.10 and 150.31

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Solution

The fourth proportional to 381.50, 572.10 and 150.31 is: 225.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.50 : 572.10 = 150.31 : x
  2. Step 2: Convert to fraction form
    381.50/572.10 = 150.31/x
  3. Step 3: Cross multiply
    381.50x = 572.10 × 150.31
  4. Step 4: Simplify right side
    381.50x = 85,990.92
  5. Step 5: Solve for x
    x = 85,990.92/381.50
  6. Step 6: Final answer
    x = 225.41

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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.