Home / 1,945-2,920

Finding the Third Proportional to 1,945 and 2,920

Calculator

Solution

The third proportional to 1,945 and 2,920 is: 4,383.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945 : 2,920 = 2,920 : x
  2. Step 2: Convert to fraction form
    1,945/2,920 = 2,920/x
  3. Step 3: Cross multiply
    1,945x = 2,920 × 2,920
  4. Step 4: Simplify right side
    1,945x = 8,526,400
  5. Step 5: Solve for x
    x = 8,526,400/1,945
  6. Step 6: Final answer
    x = 4,383.75

Related Problems

Find third proportional to 972.50 and 1,460
Half scale
Find third proportional to 3,890 and 5,840
Double scale
Find third proportional to 1,947 and 2,923
Similar ratio
Find third proportional to 2,917.50 and 4,380
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.