Home / 1,085-1,570

Finding the Third Proportional to 1,085 and 1,570

Calculator

Solution

The third proportional to 1,085 and 1,570 is: 2,271.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085 : 1,570 = 1,570 : x
  2. Step 2: Convert to fraction form
    1,085/1,570 = 1,570/x
  3. Step 3: Cross multiply
    1,085x = 1,570 × 1,570
  4. Step 4: Simplify right side
    1,085x = 2,464,900
  5. Step 5: Solve for x
    x = 2,464,900/1,085
  6. Step 6: Final answer
    x = 2,271.80

Related Problems

Find third proportional to 542.50 and 785
Half scale
Find third proportional to 2,170 and 3,140
Double scale
Find third proportional to 1,087 and 1,573
Similar ratio
Find third proportional to 1,627.50 and 2,355
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.