Home / 671.25-721.50

Finding the Third Proportional to 671.25 and 721.50

Calculator

Solution

The third proportional to 671.25 and 721.50 is: 775.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.25 : 721.50 = 721.50 : x
  2. Step 2: Convert to fraction form
    671.25/721.50 = 721.50/x
  3. Step 3: Cross multiply
    671.25x = 721.50 × 721.50
  4. Step 4: Simplify right side
    671.25x = 520,562.25
  5. Step 5: Solve for x
    x = 520,562.25/671.25
  6. Step 6: Final answer
    x = 775.51

Related Problems

Find third proportional to 335.63 and 360.75
Half scale
Find third proportional to 1,342.50 and 1,443
Double scale
Find third proportional to 673 and 724
Similar ratio
Find third proportional to 1,006.88 and 1,082.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.