Home / 243,285-387,411

Finding the Third Proportional to 243,285 and 387,411

Calculator

Solution

The third proportional to 243,285 and 387,411 is: 616,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,285 : 387,411 = 387,411 : x
  2. Step 2: Convert to fraction form
    243,285/387,411 = 387,411/x
  3. Step 3: Cross multiply
    243,285x = 387,411 × 387,411
  4. Step 4: Simplify right side
    243,285x = 150,087,282,921
  5. Step 5: Solve for x
    x = 150,087,282,921/243,285
  6. Step 6: Final answer
    x = 616,919.59

Related Problems

Find third proportional to 121,642.50 and 193,705.50
Half scale
Find third proportional to 486,570 and 774,822
Double scale
Find third proportional to 243,287 and 387,414
Similar ratio
Find third proportional to 364,927.50 and 581,116.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.