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Finding the Fourth Proportional to 381.30, 570.81 and 251.04

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Solution

The fourth proportional to 381.30, 570.81 and 251.04 is: 375.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.30 : 570.81 = 251.04 : x
  2. Step 2: Convert to fraction form
    381.30/570.81 = 251.04/x
  3. Step 3: Cross multiply
    381.30x = 570.81 × 251.04
  4. Step 4: Simplify right side
    381.30x = 143,296.14
  5. Step 5: Solve for x
    x = 143,296.14/381.30
  6. Step 6: Final answer
    x = 375.81

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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.