Home / 1,981.68-2,734.80-1,195.80

Finding the Fourth Proportional to 1,981.68, 2,734.80 and 1,195.80

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Solution

The fourth proportional to 1,981.68, 2,734.80 and 1,195.80 is: 1,650.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.68 : 2,734.80 = 1,195.80 : x
  2. Step 2: Convert to fraction form
    1,981.68/2,734.80 = 1,195.80/x
  3. Step 3: Cross multiply
    1,981.68x = 2,734.80 × 1,195.80
  4. Step 4: Simplify right side
    1,981.68x = 3,270,273.84
  5. Step 5: Solve for x
    x = 3,270,273.84/1,981.68
  6. Step 6: Final answer
    x = 1,650.25

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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.