Home / 321,572-689,800

Finding the Third Proportional to 321,572 and 689,800

Calculator

Solution

The third proportional to 321,572 and 689,800 is: 1,479,681.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,572 : 689,800 = 689,800 : x
  2. Step 2: Convert to fraction form
    321,572/689,800 = 689,800/x
  3. Step 3: Cross multiply
    321,572x = 689,800 × 689,800
  4. Step 4: Simplify right side
    321,572x = 475,824,040,000
  5. Step 5: Solve for x
    x = 475,824,040,000/321,572
  6. Step 6: Final answer
    x = 1,479,681.19

Related Problems

Find third proportional to 160,786 and 344,900
Half scale
Find third proportional to 643,144 and 1,379,600
Double scale
Find third proportional to 321,574 and 689,804
Similar ratio
Find third proportional to 482,358 and 1,034,700
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.