Home / 2,819.77-3,890.90-1,685.43

Finding the Fourth Proportional to 2,819.77, 3,890.90 and 1,685.43

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Solution

The fourth proportional to 2,819.77, 3,890.90 and 1,685.43 is: 2,325.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.77 : 3,890.90 = 1,685.43 : x
  2. Step 2: Convert to fraction form
    2,819.77/3,890.90 = 1,685.43/x
  3. Step 3: Cross multiply
    2,819.77x = 3,890.90 × 1,685.43
  4. Step 4: Simplify right side
    2,819.77x = 6,557,839.59
  5. Step 5: Solve for x
    x = 6,557,839.59/2,819.77
  6. Step 6: Final answer
    x = 2,325.66

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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.