Home / 1,491.22-2,236.40-759.79

Finding the Fourth Proportional to 1,491.22, 2,236.40 and 759.79

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Solution

The fourth proportional to 1,491.22, 2,236.40 and 759.79 is: 1,139.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.22 : 2,236.40 = 759.79 : x
  2. Step 2: Convert to fraction form
    1,491.22/2,236.40 = 759.79/x
  3. Step 3: Cross multiply
    1,491.22x = 2,236.40 × 759.79
  4. Step 4: Simplify right side
    1,491.22x = 1,699,194.36
  5. Step 5: Solve for x
    x = 1,699,194.36/1,491.22
  6. Step 6: Final answer
    x = 1,139.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.