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Finding the Fourth Proportional to 3,879.74, 5,817.30 and 2,631.87

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Solution

The fourth proportional to 3,879.74, 5,817.30 and 2,631.87 is: 3,946.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.74 : 5,817.30 = 2,631.87 : x
  2. Step 2: Convert to fraction form
    3,879.74/5,817.30 = 2,631.87/x
  3. Step 3: Cross multiply
    3,879.74x = 5,817.30 × 2,631.87
  4. Step 4: Simplify right side
    3,879.74x = 15,310,377.35
  5. Step 5: Solve for x
    x = 15,310,377.35/3,879.74
  6. Step 6: Final answer
    x = 3,946.24

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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.