Home / 2,819.08-3,890.34-1,639.84

Finding the Fourth Proportional to 2,819.08, 3,890.34 and 1,639.84

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Solution

The fourth proportional to 2,819.08, 3,890.34 and 1,639.84 is: 2,262.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.08 : 3,890.34 = 1,639.84 : x
  2. Step 2: Convert to fraction form
    2,819.08/3,890.34 = 1,639.84/x
  3. Step 3: Cross multiply
    2,819.08x = 3,890.34 × 1,639.84
  4. Step 4: Simplify right side
    2,819.08x = 6,379,535.15
  5. Step 5: Solve for x
    x = 6,379,535.15/2,819.08
  6. Step 6: Final answer
    x = 2,262.98

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1.5x scale

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.