Home / 715.50-1,689.75

Finding the Third Proportional to 715.50 and 1,689.75

Calculator

Solution

The third proportional to 715.50 and 1,689.75 is: 3,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.50 : 1,689.75 = 1,689.75 : x
  2. Step 2: Convert to fraction form
    715.50/1,689.75 = 1,689.75/x
  3. Step 3: Cross multiply
    715.50x = 1,689.75 × 1,689.75
  4. Step 4: Simplify right side
    715.50x = 2,855,255.06
  5. Step 5: Solve for x
    x = 2,855,255.06/715.50
  6. Step 6: Final answer
    x = 3,990.57

Related Problems

Find third proportional to 357.75 and 844.88
Half scale
Find third proportional to 1,431 and 3,379.50
Double scale
Find third proportional to 718 and 1,694
Similar ratio
Find third proportional to 1,073.25 and 2,534.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.