Home / 1,391.35-2,091.84-1,119.33

Finding the Fourth Proportional to 1,391.35, 2,091.84 and 1,119.33

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Solution

The fourth proportional to 1,391.35, 2,091.84 and 1,119.33 is: 1,682.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.35 : 2,091.84 = 1,119.33 : x
  2. Step 2: Convert to fraction form
    1,391.35/2,091.84 = 1,119.33/x
  3. Step 3: Cross multiply
    1,391.35x = 2,091.84 × 1,119.33
  4. Step 4: Simplify right side
    1,391.35x = 2,341,459.27
  5. Step 5: Solve for x
    x = 2,341,459.27/1,391.35
  6. Step 6: Final answer
    x = 1,682.87

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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.