Home / 919.50-1,821

Finding the Third Proportional to 919.50 and 1,821

Calculator

Solution

The third proportional to 919.50 and 1,821 is: 3,606.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.50 : 1,821 = 1,821 : x
  2. Step 2: Convert to fraction form
    919.50/1,821 = 1,821/x
  3. Step 3: Cross multiply
    919.50x = 1,821 × 1,821
  4. Step 4: Simplify right side
    919.50x = 3,316,041
  5. Step 5: Solve for x
    x = 3,316,041/919.50
  6. Step 6: Final answer
    x = 3,606.35

Related Problems

Find third proportional to 459.75 and 910.50
Half scale
Find third proportional to 1,839 and 3,642
Double scale
Find third proportional to 922 and 1,825
Similar ratio
Find third proportional to 1,379.25 and 2,731.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.