Home / 290,788-640,112

Finding the Third Proportional to 290,788 and 640,112

Calculator

Solution

The third proportional to 290,788 and 640,112 is: 1,409,079.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,788 : 640,112 = 640,112 : x
  2. Step 2: Convert to fraction form
    290,788/640,112 = 640,112/x
  3. Step 3: Cross multiply
    290,788x = 640,112 × 640,112
  4. Step 4: Simplify right side
    290,788x = 409,743,372,544
  5. Step 5: Solve for x
    x = 409,743,372,544/290,788
  6. Step 6: Final answer
    x = 1,409,079.37

Related Problems

Find third proportional to 145,394 and 320,056
Half scale
Find third proportional to 581,576 and 1,280,224
Double scale
Find third proportional to 290,790 and 640,116
Similar ratio
Find third proportional to 436,182 and 960,168
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.