Home / 290,257-439,765

Finding the Third Proportional to 290,257 and 439,765

Calculator

Solution

The third proportional to 290,257 and 439,765 is: 666,282.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,257 : 439,765 = 439,765 : x
  2. Step 2: Convert to fraction form
    290,257/439,765 = 439,765/x
  3. Step 3: Cross multiply
    290,257x = 439,765 × 439,765
  4. Step 4: Simplify right side
    290,257x = 193,393,255,225
  5. Step 5: Solve for x
    x = 193,393,255,225/290,257
  6. Step 6: Final answer
    x = 666,282.83

Related Problems

Find third proportional to 145,128.50 and 219,882.50
Half scale
Find third proportional to 580,514 and 879,530
Double scale
Find third proportional to 290,259 and 439,768
Similar ratio
Find third proportional to 435,385.50 and 659,647.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.