Home / 661.50-807.75

Finding the Third Proportional to 661.50 and 807.75

Calculator

Solution

The third proportional to 661.50 and 807.75 is: 986.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.50 : 807.75 = 807.75 : x
  2. Step 2: Convert to fraction form
    661.50/807.75 = 807.75/x
  3. Step 3: Cross multiply
    661.50x = 807.75 × 807.75
  4. Step 4: Simplify right side
    661.50x = 652,460.06
  5. Step 5: Solve for x
    x = 652,460.06/661.50
  6. Step 6: Final answer
    x = 986.33

Related Problems

Find third proportional to 330.75 and 403.88
Half scale
Find third proportional to 1,323 and 1,615.50
Double scale
Find third proportional to 664 and 810
Similar ratio
Find third proportional to 992.25 and 1,211.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.