Home / 1,981.20-2,733.81-1,141.80

Finding the Fourth Proportional to 1,981.20, 2,733.81 and 1,141.80

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Solution

The fourth proportional to 1,981.20, 2,733.81 and 1,141.80 is: 1,575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.20 : 2,733.81 = 1,141.80 : x
  2. Step 2: Convert to fraction form
    1,981.20/2,733.81 = 1,141.80/x
  3. Step 3: Cross multiply
    1,981.20x = 2,733.81 × 1,141.80
  4. Step 4: Simplify right side
    1,981.20x = 3,121,464.26
  5. Step 5: Solve for x
    x = 3,121,464.26/1,981.20
  6. Step 6: Final answer
    x = 1,575.54

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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.