Home / 306,780-628,431

Finding the Third Proportional to 306,780 and 628,431

Calculator

Solution

The third proportional to 306,780 and 628,431 is: 1,287,324.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,780 : 628,431 = 628,431 : x
  2. Step 2: Convert to fraction form
    306,780/628,431 = 628,431/x
  3. Step 3: Cross multiply
    306,780x = 628,431 × 628,431
  4. Step 4: Simplify right side
    306,780x = 394,925,521,761
  5. Step 5: Solve for x
    x = 394,925,521,761/306,780
  6. Step 6: Final answer
    x = 1,287,324.86

Related Problems

Find third proportional to 153,390 and 314,215.50
Half scale
Find third proportional to 613,560 and 1,256,862
Double scale
Find third proportional to 306,782 and 628,435
Similar ratio
Find third proportional to 460,170 and 942,646.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.