Home / 1,986.45-2,741.09-1,189.68

Finding the Fourth Proportional to 1,986.45, 2,741.09 and 1,189.68

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Solution

The fourth proportional to 1,986.45, 2,741.09 and 1,189.68 is: 1,641.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.45 : 2,741.09 = 1,189.68 : x
  2. Step 2: Convert to fraction form
    1,986.45/2,741.09 = 1,189.68/x
  3. Step 3: Cross multiply
    1,986.45x = 2,741.09 × 1,189.68
  4. Step 4: Simplify right side
    1,986.45x = 3,261,014.00
  5. Step 5: Solve for x
    x = 3,261,014.00/1,986.45
  6. Step 6: Final answer
    x = 1,641.63

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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.