Home / 1,620-2,785.50

Finding the Third Proportional to 1,620 and 2,785.50

Calculator

Solution

The third proportional to 1,620 and 2,785.50 is: 4,789.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620 : 2,785.50 = 2,785.50 : x
  2. Step 2: Convert to fraction form
    1,620/2,785.50 = 2,785.50/x
  3. Step 3: Cross multiply
    1,620x = 2,785.50 × 2,785.50
  4. Step 4: Simplify right side
    1,620x = 7,759,010.25
  5. Step 5: Solve for x
    x = 7,759,010.25/1,620
  6. Step 6: Final answer
    x = 4,789.51

Related Problems

Find third proportional to 810 and 1,392.75
Half scale
Find third proportional to 3,240 and 5,571
Double scale
Find third proportional to 1,622 and 2,789
Similar ratio
Find third proportional to 2,430 and 4,178.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.