Home / 183-399

Finding the Third Proportional to 183 and 399

Calculator

Solution

The third proportional to 183 and 399 is: 869.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    183 : 399 = 399 : x
  2. Step 2: Convert to fraction form
    183/399 = 399/x
  3. Step 3: Cross multiply
    183x = 399 × 399
  4. Step 4: Simplify right side
    183x = 159,201
  5. Step 5: Solve for x
    x = 159,201/183
  6. Step 6: Final answer
    x = 869.95

Related Problems

Find third proportional to 91.50 and 199.50
Half scale
Find third proportional to 366 and 798
Double scale
Find third proportional to 185 and 403
Similar ratio
Find third proportional to 274.50 and 598.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.