Home / 945-1,991.25

Finding the Third Proportional to 945 and 1,991.25

Calculator

Solution

The third proportional to 945 and 1,991.25 is: 4,195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    945 : 1,991.25 = 1,991.25 : x
  2. Step 2: Convert to fraction form
    945/1,991.25 = 1,991.25/x
  3. Step 3: Cross multiply
    945x = 1,991.25 × 1,991.25
  4. Step 4: Simplify right side
    945x = 3,965,076.56
  5. Step 5: Solve for x
    x = 3,965,076.56/945
  6. Step 6: Final answer
    x = 4,195.85

Related Problems

Find third proportional to 472.50 and 995.63
Half scale
Find third proportional to 1,890 and 3,982.50
Double scale
Find third proportional to 947 and 1,995
Similar ratio
Find third proportional to 1,417.50 and 2,986.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.