Home / 387,660-821,350

Finding the Third Proportional to 387,660 and 821,350

Calculator

Solution

The third proportional to 387,660 and 821,350 is: 1,740,225.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,660 : 821,350 = 821,350 : x
  2. Step 2: Convert to fraction form
    387,660/821,350 = 821,350/x
  3. Step 3: Cross multiply
    387,660x = 821,350 × 821,350
  4. Step 4: Simplify right side
    387,660x = 674,615,822,500
  5. Step 5: Solve for x
    x = 674,615,822,500/387,660
  6. Step 6: Final answer
    x = 1,740,225.51

Related Problems

Find third proportional to 193,830 and 410,675
Half scale
Find third proportional to 775,320 and 1,642,700
Double scale
Find third proportional to 387,662 and 821,354
Similar ratio
Find third proportional to 581,490 and 1,232,025
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.