Home / 292,800-639,144

Finding the Third Proportional to 292,800 and 639,144

Calculator

Solution

The third proportional to 292,800 and 639,144 is: 1,395,167.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,800 : 639,144 = 639,144 : x
  2. Step 2: Convert to fraction form
    292,800/639,144 = 639,144/x
  3. Step 3: Cross multiply
    292,800x = 639,144 × 639,144
  4. Step 4: Simplify right side
    292,800x = 408,505,052,736
  5. Step 5: Solve for x
    x = 408,505,052,736/292,800
  6. Step 6: Final answer
    x = 1,395,167.53

Related Problems

Find third proportional to 146,400 and 319,572
Half scale
Find third proportional to 585,600 and 1,278,288
Double scale
Find third proportional to 292,802 and 639,148
Similar ratio
Find third proportional to 439,200 and 958,716
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.