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Finding the Fourth Proportional to 2,523.80, 3,786.21 and 879.91

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Solution

The fourth proportional to 2,523.80, 3,786.21 and 879.91 is: 1,320.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,523.80 : 3,786.21 = 879.91 : x
  2. Step 2: Convert to fraction form
    2,523.80/3,786.21 = 879.91/x
  3. Step 3: Cross multiply
    2,523.80x = 3,786.21 × 879.91
  4. Step 4: Simplify right side
    2,523.80x = 3,331,524.04
  5. Step 5: Solve for x
    x = 3,331,524.04/2,523.80
  6. Step 6: Final answer
    x = 1,320.04

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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.