Home / 1,989.09-2,745.86-1,192.77

Finding the Fourth Proportional to 1,989.09, 2,745.86 and 1,192.77

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Solution

The fourth proportional to 1,989.09, 2,745.86 and 1,192.77 is: 1,646.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.09 : 2,745.86 = 1,192.77 : x
  2. Step 2: Convert to fraction form
    1,989.09/2,745.86 = 1,192.77/x
  3. Step 3: Cross multiply
    1,989.09x = 2,745.86 × 1,192.77
  4. Step 4: Simplify right side
    1,989.09x = 3,275,173.47
  5. Step 5: Solve for x
    x = 3,275,173.47/1,989.09
  6. Step 6: Final answer
    x = 1,646.57

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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.