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Finding the Fourth Proportional to 381.93, 571.68 and 290.27

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Solution

The fourth proportional to 381.93, 571.68 and 290.27 is: 434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.93 : 571.68 = 290.27 : x
  2. Step 2: Convert to fraction form
    381.93/571.68 = 290.27/x
  3. Step 3: Cross multiply
    381.93x = 571.68 × 290.27
  4. Step 4: Simplify right side
    381.93x = 165,938.70
  5. Step 5: Solve for x
    x = 165,938.70/381.93
  6. Step 6: Final answer
    x = 434.47

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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.