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Finding the Fourth Proportional to 381.50, 571.14 and 290.56

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Solution

The fourth proportional to 381.50, 571.14 and 290.56 is: 434.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.50 : 571.14 = 290.56 : x
  2. Step 2: Convert to fraction form
    381.50/571.14 = 290.56/x
  3. Step 3: Cross multiply
    381.50x = 571.14 × 290.56
  4. Step 4: Simplify right side
    381.50x = 165,950.44
  5. Step 5: Solve for x
    x = 165,950.44/381.50
  6. Step 6: Final answer
    x = 434.99

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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.