Home / 245-356

Finding the Third Proportional to 245 and 356

Calculator

Solution

The third proportional to 245 and 356 is: 517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    245 : 356 = 356 : x
  2. Step 2: Convert to fraction form
    245/356 = 356/x
  3. Step 3: Cross multiply
    245x = 356 × 356
  4. Step 4: Simplify right side
    245x = 126,736
  5. Step 5: Solve for x
    x = 126,736/245
  6. Step 6: Final answer
    x = 517.29

Related Problems

Find third proportional to 122.50 and 178
Half scale
Find third proportional to 490 and 712
Double scale
Find third proportional to 247 and 359
Similar ratio
Find third proportional to 367.50 and 534
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.