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Finding the Fourth Proportional to 381.67, 571.79 and 304.72

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Solution

The fourth proportional to 381.67, 571.79 and 304.72 is: 456.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.67 : 571.79 = 304.72 : x
  2. Step 2: Convert to fraction form
    381.67/571.79 = 304.72/x
  3. Step 3: Cross multiply
    381.67x = 571.79 × 304.72
  4. Step 4: Simplify right side
    381.67x = 174,235.85
  5. Step 5: Solve for x
    x = 174,235.85/381.67
  6. Step 6: Final answer
    x = 456.51

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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.