Home / 721.50-1,087.13

Finding the Third Proportional to 721.50 and 1,087.13

Calculator

Solution

The third proportional to 721.50 and 1,087.13 is: 1,638.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.50 : 1,087.13 = 1,087.13 : x
  2. Step 2: Convert to fraction form
    721.50/1,087.13 = 1,087.13/x
  3. Step 3: Cross multiply
    721.50x = 1,087.13 × 1,087.13
  4. Step 4: Simplify right side
    721.50x = 1,181,840.77
  5. Step 5: Solve for x
    x = 1,181,840.77/721.50
  6. Step 6: Final answer
    x = 1,638.03

Related Problems

Find third proportional to 360.75 and 543.56
Half scale
Find third proportional to 1,443 and 2,174.25
Double scale
Find third proportional to 724 and 1,090
Similar ratio
Find third proportional to 1,082.25 and 1,630.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.