Home / 3,619.68-4,997.40-2,778.78

Finding the Fourth Proportional to 3,619.68, 4,997.40 and 2,778.78

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Solution

The fourth proportional to 3,619.68, 4,997.40 and 2,778.78 is: 3,836.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.68 : 4,997.40 = 2,778.78 : x
  2. Step 2: Convert to fraction form
    3,619.68/4,997.40 = 2,778.78/x
  3. Step 3: Cross multiply
    3,619.68x = 4,997.40 × 2,778.78
  4. Step 4: Simplify right side
    3,619.68x = 13,886,675.17
  5. Step 5: Solve for x
    x = 13,886,675.17/3,619.68
  6. Step 6: Final answer
    x = 3,836.44

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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.