Home / 1,980.31-2,745.32-1,874.98

Finding the Fourth Proportional to 1,980.31, 2,745.32 and 1,874.98

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Solution

The fourth proportional to 1,980.31, 2,745.32 and 1,874.98 is: 2,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.31 : 2,745.32 = 1,874.98 : x
  2. Step 2: Convert to fraction form
    1,980.31/2,745.32 = 1,874.98/x
  3. Step 3: Cross multiply
    1,980.31x = 2,745.32 × 1,874.98
  4. Step 4: Simplify right side
    1,980.31x = 5,147,420.09
  5. Step 5: Solve for x
    x = 5,147,420.09/1,980.31
  6. Step 6: Final answer
    x = 2,599.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.