Home / 670-939.50

Finding the Third Proportional to 670 and 939.50

Calculator

Solution

The third proportional to 670 and 939.50 is: 1,317.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    670 : 939.50 = 939.50 : x
  2. Step 2: Convert to fraction form
    670/939.50 = 939.50/x
  3. Step 3: Cross multiply
    670x = 939.50 × 939.50
  4. Step 4: Simplify right side
    670x = 882,660.25
  5. Step 5: Solve for x
    x = 882,660.25/670
  6. Step 6: Final answer
    x = 1,317.40

Related Problems

Find third proportional to 335 and 469.75
Half scale
Find third proportional to 1,340 and 1,879
Double scale
Find third proportional to 672 and 942
Similar ratio
Find third proportional to 1,005 and 1,409.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.