Home / 2,840.36-3,919.76-1,581.47

Finding the Fourth Proportional to 2,840.36, 3,919.76 and 1,581.47

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Solution

The fourth proportional to 2,840.36, 3,919.76 and 1,581.47 is: 2,182.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.36 : 3,919.76 = 1,581.47 : x
  2. Step 2: Convert to fraction form
    2,840.36/3,919.76 = 1,581.47/x
  3. Step 3: Cross multiply
    2,840.36x = 3,919.76 × 1,581.47
  4. Step 4: Simplify right side
    2,840.36x = 6,198,982.85
  5. Step 5: Solve for x
    x = 6,198,982.85/2,840.36
  6. Step 6: Final answer
    x = 2,182.46

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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.