Home / 321,728-699,488

Finding the Third Proportional to 321,728 and 699,488

Calculator

Solution

The third proportional to 321,728 and 699,488 is: 1,520,798.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,728 : 699,488 = 699,488 : x
  2. Step 2: Convert to fraction form
    321,728/699,488 = 699,488/x
  3. Step 3: Cross multiply
    321,728x = 699,488 × 699,488
  4. Step 4: Simplify right side
    321,728x = 489,283,462,144
  5. Step 5: Solve for x
    x = 489,283,462,144/321,728
  6. Step 6: Final answer
    x = 1,520,798.51

Related Problems

Find third proportional to 160,864 and 349,744
Half scale
Find third proportional to 643,456 and 1,398,976
Double scale
Find third proportional to 321,730 and 699,492
Similar ratio
Find third proportional to 482,592 and 1,049,232
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.