Home / 296-642

Finding the Third Proportional to 296 and 642

Calculator

Solution

The third proportional to 296 and 642 is: 1,392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    296 : 642 = 642 : x
  2. Step 2: Convert to fraction form
    296/642 = 642/x
  3. Step 3: Cross multiply
    296x = 642 × 642
  4. Step 4: Simplify right side
    296x = 412,164
  5. Step 5: Solve for x
    x = 412,164/296
  6. Step 6: Final answer
    x = 1,392.45

Related Problems

Find third proportional to 148 and 321
Half scale
Find third proportional to 592 and 1,284
Double scale
Find third proportional to 298 and 646
Similar ratio
Find third proportional to 444 and 963
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.