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II.Find the missing terms.

6) 3:4 = 6:___
7) 5:___ = 25:35
8) ___:7 = 9:21
9) 4:___ = 20:25
10) 6:5 = ___:25​

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D: Find the missing terms.

6) 3:4 = 6:8

— Multiply both means. (The means are 6 and 4.)

  • 6 × 4 = 24

— Divide the product of two means by the given extreme. (3 => extreme)

  • 24 ÷ 3 = 8

The missing term is 8.

7) 5:7 = 25:35

— Multiply both extremes. (The extremes are 5 and 35.)

  • 5 × 35 = 175

— Divide the product of the two by the given mean. (25 => mean)

  • 175 ÷ 25 = 7

The missing term is 7.

8) 3:7 = 9:21

— Multiply both means. (The means are 7 and 9.)

  • 7 × 9 = 63

— Divide the product by the given extreme. (21 => extreme)

  • 63 ÷ 21 = 3

The missing term is 3.

9) 4:5 = 20:25

— Multiply both extremes. (Extremes: 4 and 25)

  • 25 × 4 = 100

— Divide the product by the given mean. (20 => mean)

  • 100 ÷ 20 = 5

The missing term is 5.

10) 6:5 = 30:25

— Multiply both extremes. (25 and 6 are extremes.)

  • 25 × 6 = 150

— Divide the product by the given mean. (mean: 5)

  • 150 ÷ 5 = 30

The missing term is 30.

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