Home / 1,240-3,180

Finding the Third Proportional to 1,240 and 3,180

Calculator

Solution

The third proportional to 1,240 and 3,180 is: 8,155.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240 : 3,180 = 3,180 : x
  2. Step 2: Convert to fraction form
    1,240/3,180 = 3,180/x
  3. Step 3: Cross multiply
    1,240x = 3,180 × 3,180
  4. Step 4: Simplify right side
    1,240x = 10,112,400
  5. Step 5: Solve for x
    x = 10,112,400/1,240
  6. Step 6: Final answer
    x = 8,155.16

Related Problems

Find third proportional to 620 and 1,590
Half scale
Find third proportional to 2,480 and 6,360
Double scale
Find third proportional to 1,242 and 3,185
Similar ratio
Find third proportional to 1,860 and 4,770
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.