Home / 370-644

Finding the Third Proportional to 370 and 644

Calculator

Solution

The third proportional to 370 and 644 is: 1,120.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    370 : 644 = 644 : x
  2. Step 2: Convert to fraction form
    370/644 = 644/x
  3. Step 3: Cross multiply
    370x = 644 × 644
  4. Step 4: Simplify right side
    370x = 414,736
  5. Step 5: Solve for x
    x = 414,736/370
  6. Step 6: Final answer
    x = 1,120.91

Related Problems

Find third proportional to 185 and 322
Half scale
Find third proportional to 740 and 1,288
Double scale
Find third proportional to 372 and 647
Similar ratio
Find third proportional to 555 and 966
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.