Ratio and Proportion Crossword

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Across
  1. 3. Two ratios are called ________ if the fractions corresponding to them are the same
Down
  1. 1. An equality of two ratios is called a __________
  2. 2. The relation between two numbers which shows how much bigger one quantity is than another is called _______
  3. 3. The Greek mathematician invented ratio and proportion when he collected the results appearing in the elements.
  4. 4. Four quantities a,b,c and d are called ________ of proportion