Is speed of sound proportional to distanced traveled?

Answer 1

No. The amplitude of the sound (and therefore its loudness) will decrease at greater distances; the speed will remain constant (assuming other factors, such as the density of air and the temperature, are constant).

Answer 2

No, the speed of sound is primarily determined by the medium through which it travels (e.g., air, water, or solid materials) rather than the distance it travels. In general, sound travels faster in denser materials and slower in less dense materials.