Make the common term (String B) the same in both ratios to find the three-part ratio.

• String A : String B = \(1 : 10\)
• String B : String C = \(4 : 5 = 20 : 25\)
• String A : String B : String C = \(2 : 20 : 25\) (scale A:B by 2)

Final Answer: 2 : 20 : 25