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Finding the Fourth Proportional to 3,879, 5,818.55 and 957.31

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Solution

The fourth proportional to 3,879, 5,818.55 and 957.31 is: 1,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879 : 5,818.55 = 957.31 : x
  2. Step 2: Convert to fraction form
    3,879/5,818.55 = 957.31/x
  3. Step 3: Cross multiply
    3,879x = 5,818.55 × 957.31
  4. Step 4: Simplify right side
    3,879x = 5,570,136.77
  5. Step 5: Solve for x
    x = 5,570,136.77/3,879
  6. Step 6: Final answer
    x = 1,435.97

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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.