Home / 337.50-639

Finding the Third Proportional to 337.50 and 639

Calculator

Solution

The third proportional to 337.50 and 639 is: 1,209.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.50 : 639 = 639 : x
  2. Step 2: Convert to fraction form
    337.50/639 = 639/x
  3. Step 3: Cross multiply
    337.50x = 639 × 639
  4. Step 4: Simplify right side
    337.50x = 408,321
  5. Step 5: Solve for x
    x = 408,321/337.50
  6. Step 6: Final answer
    x = 1,209.84

Related Problems

Find third proportional to 168.75 and 319.50
Half scale
Find third proportional to 675 and 1,278
Double scale
Find third proportional to 340 and 643
Similar ratio
Find third proportional to 506.25 and 958.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.