Home / 368-642

Finding the Third Proportional to 368 and 642

Calculator

Solution

The third proportional to 368 and 642 is: 1,120.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    368 : 642 = 642 : x
  2. Step 2: Convert to fraction form
    368/642 = 642/x
  3. Step 3: Cross multiply
    368x = 642 × 642
  4. Step 4: Simplify right side
    368x = 412,164
  5. Step 5: Solve for x
    x = 412,164/368
  6. Step 6: Final answer
    x = 1,120.01

Related Problems

Find third proportional to 184 and 321
Half scale
Find third proportional to 736 and 1,284
Double scale
Find third proportional to 370 and 645
Similar ratio
Find third proportional to 552 and 963
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.74) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.