Home / 317,190-491,721

Finding the Third Proportional to 317,190 and 491,721

Calculator

Solution

The third proportional to 317,190 and 491,721 is: 762,286.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,190 : 491,721 = 491,721 : x
  2. Step 2: Convert to fraction form
    317,190/491,721 = 491,721/x
  3. Step 3: Cross multiply
    317,190x = 491,721 × 491,721
  4. Step 4: Simplify right side
    317,190x = 241,789,541,841
  5. Step 5: Solve for x
    x = 241,789,541,841/317,190
  6. Step 6: Final answer
    x = 762,286.14

Related Problems

Find third proportional to 158,595 and 245,860.50
Half scale
Find third proportional to 634,380 and 983,442
Double scale
Find third proportional to 317,192 and 491,724
Similar ratio
Find third proportional to 475,785 and 737,581.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.