Home / 1,919.80-2,649.45-1,080.55

Finding the Fourth Proportional to 1,919.80, 2,649.45 and 1,080.55

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Solution

The fourth proportional to 1,919.80, 2,649.45 and 1,080.55 is: 1,491.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.80 : 2,649.45 = 1,080.55 : x
  2. Step 2: Convert to fraction form
    1,919.80/2,649.45 = 1,080.55/x
  3. Step 3: Cross multiply
    1,919.80x = 2,649.45 × 1,080.55
  4. Step 4: Simplify right side
    1,919.80x = 2,862,863.20
  5. Step 5: Solve for x
    x = 2,862,863.20/1,919.80
  6. Step 6: Final answer
    x = 1,491.23

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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.