Home / 213,670-309,481

Finding the Third Proportional to 213,670 and 309,481

Calculator

Solution

The third proportional to 213,670 and 309,481 is: 448,254.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,670 : 309,481 = 309,481 : x
  2. Step 2: Convert to fraction form
    213,670/309,481 = 309,481/x
  3. Step 3: Cross multiply
    213,670x = 309,481 × 309,481
  4. Step 4: Simplify right side
    213,670x = 95,778,489,361
  5. Step 5: Solve for x
    x = 95,778,489,361/213,670
  6. Step 6: Final answer
    x = 448,254.27

Related Problems

Find third proportional to 106,835 and 154,740.50
Half scale
Find third proportional to 427,340 and 618,962
Double scale
Find third proportional to 213,672 and 309,484
Similar ratio
Find third proportional to 320,505 and 464,221.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.