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Finding the Fourth Proportional to 381.25, 571.33 and 303.86

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Solution

The fourth proportional to 381.25, 571.33 and 303.86 is: 455.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.25 : 571.33 = 303.86 : x
  2. Step 2: Convert to fraction form
    381.25/571.33 = 303.86/x
  3. Step 3: Cross multiply
    381.25x = 571.33 × 303.86
  4. Step 4: Simplify right side
    381.25x = 173,604.33
  5. Step 5: Solve for x
    x = 173,604.33/381.25
  6. Step 6: Final answer
    x = 455.36

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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.