Home / 1,986.40-2,738.64-1,649.44

Finding the Fourth Proportional to 1,986.40, 2,738.64 and 1,649.44

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Solution

The fourth proportional to 1,986.40, 2,738.64 and 1,649.44 is: 2,274.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.40 : 2,738.64 = 1,649.44 : x
  2. Step 2: Convert to fraction form
    1,986.40/2,738.64 = 1,649.44/x
  3. Step 3: Cross multiply
    1,986.40x = 2,738.64 × 1,649.44
  4. Step 4: Simplify right side
    1,986.40x = 4,517,222.36
  5. Step 5: Solve for x
    x = 4,517,222.36/1,986.40
  6. Step 6: Final answer
    x = 2,274.07

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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.