Patrick is $$\frac{3}{4}$$ of Father and $$\frac{6}{7}$$ of Mother. Make Patrick the same number of units in both ratios.<br><br>[[model:questions/solutions/q4361.png]]<br><br>• Patrick : Father = 3 : 4 = 12 : 16<br>• Patrick : Mother = 6 : 7 = 12 : 14<br>• Combined → Father : Mother : Patrick = 16 : 14 : 12<br>• Father − Mother → 16u − 14u = 2u → 22 cm<br>• 1u → 22 ÷ 2 = 11 cm ⇒ Patrick = 12 × 11 = 132 cm<br><br>Patrick is 132 cm tall.<br>Check: Father = 16 × 11 = 176 cm. Mother = 14 × 11 = 154 cm. 176 − 154 = 22. ✓