1.

Determine the fourth proportional to the numbers 5,6 and 8.

Answer» let us assume that x is the fourth proportional to 5,6 and 8.
`implies5:6::8:x`
product of means=Product of extremes
`implies5xx x=6xx8impliesx=(48)/(5)=9.6`
`therefore` The fourth proportional to 5,6 and 8 is 9.6.


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