Home / 1,399.24-1,930.30-1,119.87

Finding the Fourth Proportional to 1,399.24, 1,930.30 and 1,119.87

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Solution

The fourth proportional to 1,399.24, 1,930.30 and 1,119.87 is: 1,544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.24 : 1,930.30 = 1,119.87 : x
  2. Step 2: Convert to fraction form
    1,399.24/1,930.30 = 1,119.87/x
  3. Step 3: Cross multiply
    1,399.24x = 1,930.30 × 1,119.87
  4. Step 4: Simplify right side
    1,399.24x = 2,161,685.06
  5. Step 5: Solve for x
    x = 2,161,685.06/1,399.24
  6. Step 6: Final answer
    x = 1,544.90

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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.