Missing Proportions

                    Lesson 1

                                 

                                                            Problem:                   The given ratio is proportional, find x:   x: 5 = 30:25

                                                            Solution                    First convert fraction into simple form i.e. x/5= 30/25           

Step 1:                                                                                                           

                     

                                                                                Solution                          We can also write it as:       30/25 = x/5

Step 2:                                                                       

 

Solution                   Dividing both sides by 5:

Step 3:                                           

  30 = 6

  25    5                                

 

                                                x = 6

 

                                                            Solution                    The answer is: 6

 Step 4:                                                                      

 Complete                                                                   

                                                                                                                               

                                                             Try two practice problems:  

 

Find the proportion between the numbers

 

A.

1/10 = n/60

B.

4 / 8 = 16 / x

 

 

 

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