Home / 291,928-439,980

Finding the Third Proportional to 291,928 and 439,980

Calculator

Solution

The third proportional to 291,928 and 439,980 is: 663,116.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,928 : 439,980 = 439,980 : x
  2. Step 2: Convert to fraction form
    291,928/439,980 = 439,980/x
  3. Step 3: Cross multiply
    291,928x = 439,980 × 439,980
  4. Step 4: Simplify right side
    291,928x = 193,582,400,400
  5. Step 5: Solve for x
    x = 193,582,400,400/291,928
  6. Step 6: Final answer
    x = 663,116.93

Related Problems

Find third proportional to 145,964 and 219,990
Half scale
Find third proportional to 583,856 and 879,960
Double scale
Find third proportional to 291,930 and 439,983
Similar ratio
Find third proportional to 437,892 and 659,970
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.