Home / 2,818.46-3,890.27-1,639.78

Finding the Fourth Proportional to 2,818.46, 3,890.27 and 1,639.78

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Solution

The fourth proportional to 2,818.46, 3,890.27 and 1,639.78 is: 2,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.46 : 3,890.27 = 1,639.78 : x
  2. Step 2: Convert to fraction form
    2,818.46/3,890.27 = 1,639.78/x
  3. Step 3: Cross multiply
    2,818.46x = 3,890.27 × 1,639.78
  4. Step 4: Simplify right side
    2,818.46x = 6,379,181.31
  5. Step 5: Solve for x
    x = 6,379,181.31/2,818.46
  6. Step 6: Final answer
    x = 2,263.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.