Home / 1,981.87-2,734.56-1,195.76

Finding the Fourth Proportional to 1,981.87, 2,734.56 and 1,195.76

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Solution

The fourth proportional to 1,981.87, 2,734.56 and 1,195.76 is: 1,649.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.87 : 2,734.56 = 1,195.76 : x
  2. Step 2: Convert to fraction form
    1,981.87/2,734.56 = 1,195.76/x
  3. Step 3: Cross multiply
    1,981.87x = 2,734.56 × 1,195.76
  4. Step 4: Simplify right side
    1,981.87x = 3,269,884.30
  5. Step 5: Solve for x
    x = 3,269,884.30/1,981.87
  6. Step 6: Final answer
    x = 1,649.90

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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.