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Finding the Fourth Proportional to 2,840.66, 3,920.07 and 1,581.69

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Solution

The fourth proportional to 2,840.66, 3,920.07 and 1,581.69 is: 2,182.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.66 : 3,920.07 = 1,581.69 : x
  2. Step 2: Convert to fraction form
    2,840.66/3,920.07 = 1,581.69/x
  3. Step 3: Cross multiply
    2,840.66x = 3,920.07 × 1,581.69
  4. Step 4: Simplify right side
    2,840.66x = 6,200,335.52
  5. Step 5: Solve for x
    x = 6,200,335.52/2,840.66
  6. Step 6: Final answer
    x = 2,182.71

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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.