Home / 1,986.70-2,741.73-1,200.79

Finding the Fourth Proportional to 1,986.70, 2,741.73 and 1,200.79

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Solution

The fourth proportional to 1,986.70, 2,741.73 and 1,200.79 is: 1,657.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.70 : 2,741.73 = 1,200.79 : x
  2. Step 2: Convert to fraction form
    1,986.70/2,741.73 = 1,200.79/x
  3. Step 3: Cross multiply
    1,986.70x = 2,741.73 × 1,200.79
  4. Step 4: Simplify right side
    1,986.70x = 3,292,241.97
  5. Step 5: Solve for x
    x = 3,292,241.97/1,986.70
  6. Step 6: Final answer
    x = 1,657.14

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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.