def calculate_max_speed_velocity_ratio(speed_velocity_ratios):
    """
    Calculates the maximum speed velocity ratio of the gear box [h*RPM/km].

    :param speed_velocity_ratios:
        Speed velocity ratios of the gear box [h*RPM/km].
    :type speed_velocity_ratios: dict[int | float]

    :return:
        Maximum speed velocity ratio of the gear box [h*RPM/km].
    :rtype: float
    """
    return speed_velocity_ratios[max(speed_velocity_ratios)]
