Home / 823-1,387.50

Finding the Third Proportional to 823 and 1,387.50

Calculator

Solution

The third proportional to 823 and 1,387.50 is: 2,339.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    823 : 1,387.50 = 1,387.50 : x
  2. Step 2: Convert to fraction form
    823/1,387.50 = 1,387.50/x
  3. Step 3: Cross multiply
    823x = 1,387.50 × 1,387.50
  4. Step 4: Simplify right side
    823x = 1,925,156.25
  5. Step 5: Solve for x
    x = 1,925,156.25/823
  6. Step 6: Final answer
    x = 2,339.19

Related Problems

Find third proportional to 411.50 and 693.75
Half scale
Find third proportional to 1,646 and 2,775
Double scale
Find third proportional to 825 and 1,391
Similar ratio
Find third proportional to 1,234.50 and 2,081.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.