Home / 292.75-639.38

Finding the Third Proportional to 292.75 and 639.38

Calculator

Solution

The third proportional to 292.75 and 639.38 is: 1,396.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.75 : 639.38 = 639.38 : x
  2. Step 2: Convert to fraction form
    292.75/639.38 = 639.38/x
  3. Step 3: Cross multiply
    292.75x = 639.38 × 639.38
  4. Step 4: Simplify right side
    292.75x = 408,800.39
  5. Step 5: Solve for x
    x = 408,800.39/292.75
  6. Step 6: Final answer
    x = 1,396.41

Related Problems

Find third proportional to 146.38 and 319.69
Half scale
Find third proportional to 585.50 and 1,278.75
Double scale
Find third proportional to 295 and 644
Similar ratio
Find third proportional to 439.13 and 959.06
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.