Home / 448.75-643.88

Finding the Third Proportional to 448.75 and 643.88

Calculator

Solution

The third proportional to 448.75 and 643.88 is: 923.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.75 : 643.88 = 643.88 : x
  2. Step 2: Convert to fraction form
    448.75/643.88 = 643.88/x
  3. Step 3: Cross multiply
    448.75x = 643.88 × 643.88
  4. Step 4: Simplify right side
    448.75x = 414,575.02
  5. Step 5: Solve for x
    x = 414,575.02/448.75
  6. Step 6: Final answer
    x = 923.84

Related Problems

Find third proportional to 224.38 and 321.94
Half scale
Find third proportional to 897.50 and 1,287.75
Double scale
Find third proportional to 451 and 647
Similar ratio
Find third proportional to 673.13 and 965.81
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.