Home / 1,986.36-2,738.50-1,705.38

Finding the Fourth Proportional to 1,986.36, 2,738.50 and 1,705.38

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Solution

The fourth proportional to 1,986.36, 2,738.50 and 1,705.38 is: 2,351.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.36 : 2,738.50 = 1,705.38 : x
  2. Step 2: Convert to fraction form
    1,986.36/2,738.50 = 1,705.38/x
  3. Step 3: Cross multiply
    1,986.36x = 2,738.50 × 1,705.38
  4. Step 4: Simplify right side
    1,986.36x = 4,670,183.13
  5. Step 5: Solve for x
    x = 4,670,183.13/1,986.36
  6. Step 6: Final answer
    x = 2,351.13

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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.