Home / 342-653

Finding the Third Proportional to 342 and 653

Calculator

Solution

The third proportional to 342 and 653 is: 1,246.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    342 : 653 = 653 : x
  2. Step 2: Convert to fraction form
    342/653 = 653/x
  3. Step 3: Cross multiply
    342x = 653 × 653
  4. Step 4: Simplify right side
    342x = 426,409
  5. Step 5: Solve for x
    x = 426,409/342
  6. Step 6: Final answer
    x = 1,246.81

Related Problems

Find third proportional to 171 and 326.50
Half scale
Find third proportional to 684 and 1,306
Double scale
Find third proportional to 344 and 657
Similar ratio
Find third proportional to 513 and 979.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.