Home / 340,478-515,457

Finding the Third Proportional to 340,478 and 515,457

Calculator

Solution

The third proportional to 340,478 and 515,457 is: 780,361.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,478 : 515,457 = 515,457 : x
  2. Step 2: Convert to fraction form
    340,478/515,457 = 515,457/x
  3. Step 3: Cross multiply
    340,478x = 515,457 × 515,457
  4. Step 4: Simplify right side
    340,478x = 265,695,918,849
  5. Step 5: Solve for x
    x = 265,695,918,849/340,478
  6. Step 6: Final answer
    x = 780,361.49

Related Problems

Find third proportional to 170,239 and 257,728.50
Half scale
Find third proportional to 680,956 and 1,030,914
Double scale
Find third proportional to 340,480 and 515,460
Similar ratio
Find third proportional to 510,717 and 773,185.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.