Home / 290,422-435,615

Finding the Third Proportional to 290,422 and 435,615

Calculator

Solution

The third proportional to 290,422 and 435,615 is: 653,395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,422 : 435,615 = 435,615 : x
  2. Step 2: Convert to fraction form
    290,422/435,615 = 435,615/x
  3. Step 3: Cross multiply
    290,422x = 435,615 × 435,615
  4. Step 4: Simplify right side
    290,422x = 189,760,428,225
  5. Step 5: Solve for x
    x = 189,760,428,225/290,422
  6. Step 6: Final answer
    x = 653,395.50

Related Problems

Find third proportional to 145,211 and 217,807.50
Half scale
Find third proportional to 580,844 and 871,230
Double scale
Find third proportional to 290,424 and 435,618
Similar ratio
Find third proportional to 435,633 and 653,422.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.