Home / 2,840.24-3,919.92-1,661.60

Finding the Fourth Proportional to 2,840.24, 3,919.92 and 1,661.60

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Solution

The fourth proportional to 2,840.24, 3,919.92 and 1,661.60 is: 2,293.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.24 : 3,919.92 = 1,661.60 : x
  2. Step 2: Convert to fraction form
    2,840.24/3,919.92 = 1,661.60/x
  3. Step 3: Cross multiply
    2,840.24x = 3,919.92 × 1,661.60
  4. Step 4: Simplify right side
    2,840.24x = 6,513,339.07
  5. Step 5: Solve for x
    x = 6,513,339.07/2,840.24
  6. Step 6: Final answer
    x = 2,293.24

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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.