Home / 1,399.92-2,109.36-1,161.78

Finding the Fourth Proportional to 1,399.92, 2,109.36 and 1,161.78

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Solution

The fourth proportional to 1,399.92, 2,109.36 and 1,161.78 is: 1,750.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.92 : 2,109.36 = 1,161.78 : x
  2. Step 2: Convert to fraction form
    1,399.92/2,109.36 = 1,161.78/x
  3. Step 3: Cross multiply
    1,399.92x = 2,109.36 × 1,161.78
  4. Step 4: Simplify right side
    1,399.92x = 2,450,612.26
  5. Step 5: Solve for x
    x = 2,450,612.26/1,399.92
  6. Step 6: Final answer
    x = 1,750.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.