Home / 660.66-989.16

Finding the Third Proportional to 660.66 and 989.16

Calculator

Solution

The third proportional to 660.66 and 989.16 is: 1,481.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.66 : 989.16 = 989.16 : x
  2. Step 2: Convert to fraction form
    660.66/989.16 = 989.16/x
  3. Step 3: Cross multiply
    660.66x = 989.16 × 989.16
  4. Step 4: Simplify right side
    660.66x = 978,430.09
  5. Step 5: Solve for x
    x = 978,430.09/660.66
  6. Step 6: Final answer
    x = 1,481.00

Related Problems

Find third proportional to 330.33 and 494.58
Half scale
Find third proportional to 1,321.31 and 1,978.31
Double scale
Find third proportional to 663 and 992
Similar ratio
Find third proportional to 990.98 and 1,483.73
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.