Ratio Calculations
The RATIO Mode lets you determine the value of X in the ratio expression
a
:
b
= X :
d
(or
a
:
b
=
c
: X) when the values of
a
,
b
,
c
and
d
are known.
The following shows the general procedure for using RATIO.
1. Press
(RATIO) to enter the RATIO Mode.
2. On the menu that appears, select
(a:b=X:d) or
(a:b=c:X).
3. On the Coefficient Editor screen that appears, input up to 10 digits for
each of the required values (
a
,
b
,
c
,
d
).
• To solve 3 : 8 = X : 12 for X, for example, press
in step 1, and
then input the following for the coefficients (
a
= 3,
b
= 8,
d
= 12): 3
8
12
.
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press
.
• Pressing
will clear all of the coefficients to zero.
Note:
The following operations are not supported by the Coefficient
Editor:
,
(M-),
(STO). Pol, Rec, ÷R, and multi-
statements also cannot be input with the Coefficient Editor.
4. After all the values are the way you want, press
.
• This displays the solution (value of X).
• Pressing
again will return to the Coefficient Editor.
Important!
• A Math ERROR will occur if you perform a calculation while 0 is input for a coefficient.
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Summary of Contents for fx-82ZA PLUS
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