Home / 1,309.27-1,806.70-1,204.78

Finding the Fourth Proportional to 1,309.27, 1,806.70 and 1,204.78

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Solution

The fourth proportional to 1,309.27, 1,806.70 and 1,204.78 is: 1,662.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.27 : 1,806.70 = 1,204.78 : x
  2. Step 2: Convert to fraction form
    1,309.27/1,806.70 = 1,204.78/x
  3. Step 3: Cross multiply
    1,309.27x = 1,806.70 × 1,204.78
  4. Step 4: Simplify right side
    1,309.27x = 2,176,676.03
  5. Step 5: Solve for x
    x = 2,176,676.03/1,309.27
  6. Step 6: Final answer
    x = 1,662.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.