Home / 636.75-684

Finding the Third Proportional to 636.75 and 684

Calculator

Solution

The third proportional to 636.75 and 684 is: 734.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.75 : 684 = 684 : x
  2. Step 2: Convert to fraction form
    636.75/684 = 684/x
  3. Step 3: Cross multiply
    636.75x = 684 × 684
  4. Step 4: Simplify right side
    636.75x = 467,856
  5. Step 5: Solve for x
    x = 467,856/636.75
  6. Step 6: Final answer
    x = 734.76

Related Problems

Find third proportional to 318.38 and 342
Half scale
Find third proportional to 1,273.50 and 1,368
Double scale
Find third proportional to 639 and 686
Similar ratio
Find third proportional to 955.13 and 1,026
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.