The equation for right sided cardiac output  (Qp) over left sided cardiac output (Qs) is

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Qp = [(RVOT diameter/2)^2*pi] * RVOT VTI

Qs = [(LVOT diameter/2)^2*pi] * LVOT VTI

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pi cancels out since it is in the numerator and denominator so this =

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(2.4cm/2)^2*23cm

 (1.9cm/2)^2*22cm

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= 33.2/19,9 = 1.7