Home / 611.50-668.38

Finding the Third Proportional to 611.50 and 668.38

Calculator

Solution

The third proportional to 611.50 and 668.38 is: 730.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.50 : 668.38 = 668.38 : x
  2. Step 2: Convert to fraction form
    611.50/668.38 = 668.38/x
  3. Step 3: Cross multiply
    611.50x = 668.38 × 668.38
  4. Step 4: Simplify right side
    611.50x = 446,725.14
  5. Step 5: Solve for x
    x = 446,725.14/611.50
  6. Step 6: Final answer
    x = 730.54

Related Problems

Find third proportional to 305.75 and 334.19
Half scale
Find third proportional to 1,223 and 1,336.75
Double scale
Find third proportional to 614 and 671
Similar ratio
Find third proportional to 917.25 and 1,002.56
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.