Home / 291,380-439,750

Finding the Third Proportional to 291,380 and 439,750

Calculator

Solution

The third proportional to 291,380 and 439,750 is: 663,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,380 : 439,750 = 439,750 : x
  2. Step 2: Convert to fraction form
    291,380/439,750 = 439,750/x
  3. Step 3: Cross multiply
    291,380x = 439,750 × 439,750
  4. Step 4: Simplify right side
    291,380x = 193,380,062,500
  5. Step 5: Solve for x
    x = 193,380,062,500/291,380
  6. Step 6: Final answer
    x = 663,669.65

Related Problems

Find third proportional to 145,690 and 219,875
Half scale
Find third proportional to 582,760 and 879,500
Double scale
Find third proportional to 291,382 and 439,753
Similar ratio
Find third proportional to 437,070 and 659,625
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.