Home / 779.50-1,089.75

Finding the Third Proportional to 779.50 and 1,089.75

Calculator

Solution

The third proportional to 779.50 and 1,089.75 is: 1,523.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.50 : 1,089.75 = 1,089.75 : x
  2. Step 2: Convert to fraction form
    779.50/1,089.75 = 1,089.75/x
  3. Step 3: Cross multiply
    779.50x = 1,089.75 × 1,089.75
  4. Step 4: Simplify right side
    779.50x = 1,187,555.06
  5. Step 5: Solve for x
    x = 1,187,555.06/779.50
  6. Step 6: Final answer
    x = 1,523.48

Related Problems

Find third proportional to 389.75 and 544.88
Half scale
Find third proportional to 1,559 and 2,179.50
Double scale
Find third proportional to 782 and 1,093
Similar ratio
Find third proportional to 1,169.25 and 1,634.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.