Home / 3,619.47-5,429.86-1,280.83

Finding the Fourth Proportional to 3,619.47, 5,429.86 and 1,280.83

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Solution

The fourth proportional to 3,619.47, 5,429.86 and 1,280.83 is: 1,921.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.47 : 5,429.86 = 1,280.83 : x
  2. Step 2: Convert to fraction form
    3,619.47/5,429.86 = 1,280.83/x
  3. Step 3: Cross multiply
    3,619.47x = 5,429.86 × 1,280.83
  4. Step 4: Simplify right side
    3,619.47x = 6,954,727.58
  5. Step 5: Solve for x
    x = 6,954,727.58/3,619.47
  6. Step 6: Final answer
    x = 1,921.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.