Home / 3,216.78-4,439.40-1,819.80

Finding the Fourth Proportional to 3,216.78, 4,439.40 and 1,819.80

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Solution

The fourth proportional to 3,216.78, 4,439.40 and 1,819.80 is: 2,511.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216.78 : 4,439.40 = 1,819.80 : x
  2. Step 2: Convert to fraction form
    3,216.78/4,439.40 = 1,819.80/x
  3. Step 3: Cross multiply
    3,216.78x = 4,439.40 × 1,819.80
  4. Step 4: Simplify right side
    3,216.78x = 8,078,820.12
  5. Step 5: Solve for x
    x = 8,078,820.12/3,216.78
  6. Step 6: Final answer
    x = 2,511.46

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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.