Home / 2,040.40-2,815.78-1,108.90

Finding the Fourth Proportional to 2,040.40, 2,815.78 and 1,108.90

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Solution

The fourth proportional to 2,040.40, 2,815.78 and 1,108.90 is: 1,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,040.40 : 2,815.78 = 1,108.90 : x
  2. Step 2: Convert to fraction form
    2,040.40/2,815.78 = 1,108.90/x
  3. Step 3: Cross multiply
    2,040.40x = 2,815.78 × 1,108.90
  4. Step 4: Simplify right side
    2,040.40x = 3,122,418.44
  5. Step 5: Solve for x
    x = 3,122,418.44/2,040.40
  6. Step 6: Final answer
    x = 1,530.30

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1.5x scale

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.