Home / 472.75-643.88

Finding the Third Proportional to 472.75 and 643.88

Calculator

Solution

The third proportional to 472.75 and 643.88 is: 876.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.75 : 643.88 = 643.88 : x
  2. Step 2: Convert to fraction form
    472.75/643.88 = 643.88/x
  3. Step 3: Cross multiply
    472.75x = 643.88 × 643.88
  4. Step 4: Simplify right side
    472.75x = 414,575.02
  5. Step 5: Solve for x
    x = 414,575.02/472.75
  6. Step 6: Final answer
    x = 876.94

Related Problems

Find third proportional to 236.38 and 321.94
Half scale
Find third proportional to 945.50 and 1,287.75
Double scale
Find third proportional to 475 and 647
Similar ratio
Find third proportional to 709.13 and 965.81
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.