Home / 336.75-687

Finding the Third Proportional to 336.75 and 687

Calculator

Solution

The third proportional to 336.75 and 687 is: 1,401.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.75 : 687 = 687 : x
  2. Step 2: Convert to fraction form
    336.75/687 = 687/x
  3. Step 3: Cross multiply
    336.75x = 687 × 687
  4. Step 4: Simplify right side
    336.75x = 471,969
  5. Step 5: Solve for x
    x = 471,969/336.75
  6. Step 6: Final answer
    x = 1,401.54

Related Problems

Find third proportional to 168.38 and 343.50
Half scale
Find third proportional to 673.50 and 1,374
Double scale
Find third proportional to 339 and 691
Similar ratio
Find third proportional to 505.13 and 1,030.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.