Home / 1,212.04-1,806.41-1,187.76

Finding the Fourth Proportional to 1,212.04, 1,806.41 and 1,187.76

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Solution

The fourth proportional to 1,212.04, 1,806.41 and 1,187.76 is: 1,770.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.04 : 1,806.41 = 1,187.76 : x
  2. Step 2: Convert to fraction form
    1,212.04/1,806.41 = 1,187.76/x
  3. Step 3: Cross multiply
    1,212.04x = 1,806.41 × 1,187.76
  4. Step 4: Simplify right side
    1,212.04x = 2,145,581.54
  5. Step 5: Solve for x
    x = 2,145,581.54/1,212.04
  6. Step 6: Final answer
    x = 1,770.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.