3
4

=
x
8
,

4
3

=
8
x
,

3
x

=
4
8
,

x
3

=
8
4
,

3
4

=
x
8
,

4
3

=
8
x
,

3
x

=
4
8
,

x
3

=
8
4

Number of lemons
Number of liters of water

=
Number of lemons
Number of liters of water

4
3

=
8
x

# of lemons
# of liters of water

=
# of lemons
# of liters of water

4
3

=
8
x


Height of boy
Length of shadow

=
Height of man
Length of shadow

3
7

=
H
14

3
900

=
x
300

900
3

=
300
x

3
x

=
900
300

x
3

=
300
900

3
900

=
x
300

Number of gallons
Time it takes

=
Number of gallons
Time it takes

160
2

=
G
10

Number of gallons
Time it takes

=
Number of gallons
Time it takes

160
2

=
3000
T

Height of boy
Length of shadow

=
Height of man
Length of shadow

3
7

=
H
14

3
900

=
x
300
,

900
3

=
300
x
,

3
x

=
900
300
,

x
3

=
300
900

3
900

=
x
300

# of gallons
Time it takes

=
# of gallons
Time it takes

160
2

=
G
10

# of gallons
Time it takes

=
# of gallons
Time it takes

160
2

=
3000
T

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Jan 13, 17 01:28 PM
What is the harmonic mean? How to calculate the harmonic mean?