Home / 300,739.50-640,804.50

Finding the Third Proportional to 300,739.50 and 640,804.50

Calculator

Solution

The third proportional to 300,739.50 and 640,804.50 is: 1,365,402.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,739.50 : 640,804.50 = 640,804.50 : x
  2. Step 2: Convert to fraction form
    300,739.50/640,804.50 = 640,804.50/x
  3. Step 3: Cross multiply
    300,739.50x = 640,804.50 × 640,804.50
  4. Step 4: Simplify right side
    300,739.50x = 410,630,407,220.25
  5. Step 5: Solve for x
    x = 410,630,407,220.25/300,739.50
  6. Step 6: Final answer
    x = 1,365,402.31

Related Problems

Find third proportional to 150,369.75 and 320,402.25
Half scale
Find third proportional to 601,479 and 1,281,609
Double scale
Find third proportional to 300,742 and 640,809
Similar ratio
Find third proportional to 451,109.25 and 961,206.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.