Home / 718-918

Finding the Third Proportional to 718 and 918

Calculator

Solution

The third proportional to 718 and 918 is: 1,173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    718 : 918 = 918 : x
  2. Step 2: Convert to fraction form
    718/918 = 918/x
  3. Step 3: Cross multiply
    718x = 918 × 918
  4. Step 4: Simplify right side
    718x = 842,724
  5. Step 5: Solve for x
    x = 842,724/718
  6. Step 6: Final answer
    x = 1,173.71

Related Problems

Find third proportional to 359 and 459
Half scale
Find third proportional to 1,436 and 1,836
Double scale
Find third proportional to 720 and 921
Similar ratio
Find third proportional to 1,077 and 1,377
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.