Home / 2,688.06-4,028.45-1,390.44

Finding the Fourth Proportional to 2,688.06, 4,028.45 and 1,390.44

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Solution

The fourth proportional to 2,688.06, 4,028.45 and 1,390.44 is: 2,083.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.06 : 4,028.45 = 1,390.44 : x
  2. Step 2: Convert to fraction form
    2,688.06/4,028.45 = 1,390.44/x
  3. Step 3: Cross multiply
    2,688.06x = 4,028.45 × 1,390.44
  4. Step 4: Simplify right side
    2,688.06x = 5,601,326.17
  5. Step 5: Solve for x
    x = 5,601,326.17/2,688.06
  6. Step 6: Final answer
    x = 2,083.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.