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Finding the Fourth Proportional to 958.52, 1,439.22 and 851

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Solution

The fourth proportional to 958.52, 1,439.22 and 851 is: 1,277.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.52 : 1,439.22 = 851 : x
  2. Step 2: Convert to fraction form
    958.52/1,439.22 = 851/x
  3. Step 3: Cross multiply
    958.52x = 1,439.22 × 851
  4. Step 4: Simplify right side
    958.52x = 1,224,776.22
  5. Step 5: Solve for x
    x = 1,224,776.22/958.52
  6. Step 6: Final answer
    x = 1,277.78

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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.