Home / 211,690-291,615

Finding the Third Proportional to 211,690 and 291,615

Calculator

Solution

The third proportional to 211,690 and 291,615 is: 401,716.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,690 : 291,615 = 291,615 : x
  2. Step 2: Convert to fraction form
    211,690/291,615 = 291,615/x
  3. Step 3: Cross multiply
    211,690x = 291,615 × 291,615
  4. Step 4: Simplify right side
    211,690x = 85,039,308,225
  5. Step 5: Solve for x
    x = 85,039,308,225/211,690
  6. Step 6: Final answer
    x = 401,716.23

Related Problems

Find third proportional to 105,845 and 145,807.50
Half scale
Find third proportional to 423,380 and 583,230
Double scale
Find third proportional to 211,692 and 291,618
Similar ratio
Find third proportional to 317,535 and 437,422.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.