Home / 870.75-1,245.38

Finding the Third Proportional to 870.75 and 1,245.38

Calculator

Solution

The third proportional to 870.75 and 1,245.38 is: 1,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.75 : 1,245.38 = 1,245.38 : x
  2. Step 2: Convert to fraction form
    870.75/1,245.38 = 1,245.38/x
  3. Step 3: Cross multiply
    870.75x = 1,245.38 × 1,245.38
  4. Step 4: Simplify right side
    870.75x = 1,550,958.89
  5. Step 5: Solve for x
    x = 1,550,958.89/870.75
  6. Step 6: Final answer
    x = 1,781.18

Related Problems

Find third proportional to 435.38 and 622.69
Half scale
Find third proportional to 1,741.50 and 2,490.75
Double scale
Find third proportional to 873 and 1,248
Similar ratio
Find third proportional to 1,306.13 and 1,868.06
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.