Home / 313,131-685,338

Finding the Third Proportional to 313,131 and 685,338

Calculator

Solution

The third proportional to 313,131 and 685,338 is: 1,499,973.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,131 : 685,338 = 685,338 : x
  2. Step 2: Convert to fraction form
    313,131/685,338 = 685,338/x
  3. Step 3: Cross multiply
    313,131x = 685,338 × 685,338
  4. Step 4: Simplify right side
    313,131x = 469,688,174,244
  5. Step 5: Solve for x
    x = 469,688,174,244/313,131
  6. Step 6: Final answer
    x = 1,499,973.41

Related Problems

Find third proportional to 156,565.50 and 342,669
Half scale
Find third proportional to 626,262 and 1,370,676
Double scale
Find third proportional to 313,133 and 685,342
Similar ratio
Find third proportional to 469,696.50 and 1,028,007
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.