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Finding the Fourth Proportional to 1,919.57, 2,649.23 and 1,080.48

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Solution

The fourth proportional to 1,919.57, 2,649.23 and 1,080.48 is: 1,491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.57 : 2,649.23 = 1,080.48 : x
  2. Step 2: Convert to fraction form
    1,919.57/2,649.23 = 1,080.48/x
  3. Step 3: Cross multiply
    1,919.57x = 2,649.23 × 1,080.48
  4. Step 4: Simplify right side
    1,919.57x = 2,862,434.63
  5. Step 5: Solve for x
    x = 2,862,434.63/1,919.57
  6. Step 6: Final answer
    x = 1,491.18

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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.