Home / 356,920-489,416

Finding the Third Proportional to 356,920 and 489,416

Calculator

Solution

The third proportional to 356,920 and 489,416 is: 671,097.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,920 : 489,416 = 489,416 : x
  2. Step 2: Convert to fraction form
    356,920/489,416 = 489,416/x
  3. Step 3: Cross multiply
    356,920x = 489,416 × 489,416
  4. Step 4: Simplify right side
    356,920x = 239,528,021,056
  5. Step 5: Solve for x
    x = 239,528,021,056/356,920
  6. Step 6: Final answer
    x = 671,097.22

Related Problems

Find third proportional to 178,460 and 244,708
Half scale
Find third proportional to 713,840 and 978,832
Double scale
Find third proportional to 356,922 and 489,419
Similar ratio
Find third proportional to 535,380 and 734,124
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.