Home / 1,986.70-2,741.52-1,189.98

Finding the Fourth Proportional to 1,986.70, 2,741.52 and 1,189.98

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Solution

The fourth proportional to 1,986.70, 2,741.52 and 1,189.98 is: 1,642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.70 : 2,741.52 = 1,189.98 : x
  2. Step 2: Convert to fraction form
    1,986.70/2,741.52 = 1,189.98/x
  3. Step 3: Cross multiply
    1,986.70x = 2,741.52 × 1,189.98
  4. Step 4: Simplify right side
    1,986.70x = 3,262,353.97
  5. Step 5: Solve for x
    x = 3,262,353.97/1,986.70
  6. Step 6: Final answer
    x = 1,642.10

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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.