Home / 2,089.19-3,131.97-791.57

Finding the Fourth Proportional to 2,089.19, 3,131.97 and 791.57

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Solution

The fourth proportional to 2,089.19, 3,131.97 and 791.57 is: 1,186.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.19 : 3,131.97 = 791.57 : x
  2. Step 2: Convert to fraction form
    2,089.19/3,131.97 = 791.57/x
  3. Step 3: Cross multiply
    2,089.19x = 3,131.97 × 791.57
  4. Step 4: Simplify right side
    2,089.19x = 2,479,178.35
  5. Step 5: Solve for x
    x = 2,479,178.35/2,089.19
  6. Step 6: Final answer
    x = 1,186.67

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1.5x scale

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.