Home / 438.50-663.50

Finding the Third Proportional to 438.50 and 663.50

Calculator

Solution

The third proportional to 438.50 and 663.50 is: 1,003.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.50 : 663.50 = 663.50 : x
  2. Step 2: Convert to fraction form
    438.50/663.50 = 663.50/x
  3. Step 3: Cross multiply
    438.50x = 663.50 × 663.50
  4. Step 4: Simplify right side
    438.50x = 440,232.25
  5. Step 5: Solve for x
    x = 440,232.25/438.50
  6. Step 6: Final answer
    x = 1,003.95

Related Problems

Find third proportional to 219.25 and 331.75
Half scale
Find third proportional to 877 and 1,327
Double scale
Find third proportional to 441 and 667
Similar ratio
Find third proportional to 657.75 and 995.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.