Home / 987-1,074

Finding the Third Proportional to 987 and 1,074

Calculator

Solution

The third proportional to 987 and 1,074 is: 1,168.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    987 : 1,074 = 1,074 : x
  2. Step 2: Convert to fraction form
    987/1,074 = 1,074/x
  3. Step 3: Cross multiply
    987x = 1,074 × 1,074
  4. Step 4: Simplify right side
    987x = 1,153,476
  5. Step 5: Solve for x
    x = 1,153,476/987
  6. Step 6: Final answer
    x = 1,168.67

Related Problems

Find third proportional to 493.50 and 537
Half scale
Find third proportional to 1,974 and 2,148
Double scale
Find third proportional to 989 and 1,076
Similar ratio
Find third proportional to 1,480.50 and 1,611
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.