Home / 1,800.11-2,480.45-1,380.44

Finding the Fourth Proportional to 1,800.11, 2,480.45 and 1,380.44

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Solution

The fourth proportional to 1,800.11, 2,480.45 and 1,380.44 is: 1,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,800.11 : 2,480.45 = 1,380.44 : x
  2. Step 2: Convert to fraction form
    1,800.11/2,480.45 = 1,380.44/x
  3. Step 3: Cross multiply
    1,800.11x = 2,480.45 × 1,380.44
  4. Step 4: Simplify right side
    1,800.11x = 3,424,093.09
  5. Step 5: Solve for x
    x = 3,424,093.09/1,800.11
  6. Step 6: Final answer
    x = 1,902.16

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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.