Home / 1,979-4,238

Finding the Third Proportional to 1,979 and 4,238

Calculator

Solution

The third proportional to 1,979 and 4,238 is: 9,075.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979 : 4,238 = 4,238 : x
  2. Step 2: Convert to fraction form
    1,979/4,238 = 4,238/x
  3. Step 3: Cross multiply
    1,979x = 4,238 × 4,238
  4. Step 4: Simplify right side
    1,979x = 17,960,644
  5. Step 5: Solve for x
    x = 17,960,644/1,979
  6. Step 6: Final answer
    x = 9,075.62

Related Problems

Find third proportional to 989.50 and 2,119
Half scale
Find third proportional to 3,958 and 8,476
Double scale
Find third proportional to 1,981 and 4,242
Similar ratio
Find third proportional to 2,968.50 and 6,357
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.