Home / 308,920-721,725

Finding the Third Proportional to 308,920 and 721,725

Calculator

Solution

The third proportional to 308,920 and 721,725 is: 1,686,154.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,920 : 721,725 = 721,725 : x
  2. Step 2: Convert to fraction form
    308,920/721,725 = 721,725/x
  3. Step 3: Cross multiply
    308,920x = 721,725 × 721,725
  4. Step 4: Simplify right side
    308,920x = 520,886,975,625
  5. Step 5: Solve for x
    x = 520,886,975,625/308,920
  6. Step 6: Final answer
    x = 1,686,154.91

Related Problems

Find third proportional to 154,460 and 360,862.50
Half scale
Find third proportional to 617,840 and 1,443,450
Double scale
Find third proportional to 308,922 and 721,730
Similar ratio
Find third proportional to 463,380 and 1,082,587.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.