Home / 839-1,299

Finding the Third Proportional to 839 and 1,299

Calculator

Solution

The third proportional to 839 and 1,299 is: 2,011.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    839 : 1,299 = 1,299 : x
  2. Step 2: Convert to fraction form
    839/1,299 = 1,299/x
  3. Step 3: Cross multiply
    839x = 1,299 × 1,299
  4. Step 4: Simplify right side
    839x = 1,687,401
  5. Step 5: Solve for x
    x = 1,687,401/839
  6. Step 6: Final answer
    x = 2,011.21

Related Problems

Find third proportional to 419.50 and 649.50
Half scale
Find third proportional to 1,678 and 2,598
Double scale
Find third proportional to 841 and 1,302
Similar ratio
Find third proportional to 1,258.50 and 1,948.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.