Home / 135,240-290,412

Finding the Third Proportional to 135,240 and 290,412

Calculator

Solution

The third proportional to 135,240 and 290,412 is: 623,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,240 : 290,412 = 290,412 : x
  2. Step 2: Convert to fraction form
    135,240/290,412 = 290,412/x
  3. Step 3: Cross multiply
    135,240x = 290,412 × 290,412
  4. Step 4: Simplify right side
    135,240x = 84,339,129,744
  5. Step 5: Solve for x
    x = 84,339,129,744/135,240
  6. Step 6: Final answer
    x = 623,625.63

Related Problems

Find third proportional to 67,620 and 145,206
Half scale
Find third proportional to 270,480 and 580,824
Double scale
Find third proportional to 135,242 and 290,416
Similar ratio
Find third proportional to 202,860 and 435,618
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.