Need help with Vector addition using a Graphical and analytical methods?

Question

After doing an experiment on vector addition using a Horizontal force board (Gravesand Apparatus), with the need to use graphical and analytical methods of vector addition. For the Horizontal force board, the force-meters were stretched into the alignment of a letter Y; the two force-meters at the top each had a reading of 1.55 N whilst the force-meter at the bottom (equilibrant) had a reading of 1.85 N. The angle in between the junction of the “Y” was 110°. Using a sketch with a scale of 1 cm = 0.5 N for the graphical method. With that in mind, how can I use this information in the analytical method to calculate the Size and the direction of the Resultant force, using the both the Parallelogram rule and vector tangent rule?

Please refer to the attached image for data:

https://ibb.co/2NpZyjr

(Are my calculations correct?)

Answer 1

Resultant = sqrt(Fx^2+Fy^2) = sqrt(0^2 + 1.78^2) = 1.78N... NOT 1.33N !!

What about the overall resultant, considering FC as well? The overall resultant is the resultant of the vector you calculated and the FC which points in the negative y-axis direction... So the Ftotal_x =0, and Ftotal_y = 1.78N-1.85N = -0.07N. Then magnitude of Ftotal = 0.07N, angle 270º.