Home / 4,143.78-5,718.39-2,280.78

Finding the Fourth Proportional to 4,143.78, 5,718.39 and 2,280.78

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Solution

The fourth proportional to 4,143.78, 5,718.39 and 2,280.78 is: 3,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,143.78 : 5,718.39 = 2,280.78 : x
  2. Step 2: Convert to fraction form
    4,143.78/5,718.39 = 2,280.78/x
  3. Step 3: Cross multiply
    4,143.78x = 5,718.39 × 2,280.78
  4. Step 4: Simplify right side
    4,143.78x = 13,042,389.54
  5. Step 5: Solve for x
    x = 13,042,389.54/4,143.78
  6. Step 6: Final answer
    x = 3,147.46

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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.