Home / 745-857

Finding the Third Proportional to 745 and 857

Calculator

Solution

The third proportional to 745 and 857 is: 985.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    745 : 857 = 857 : x
  2. Step 2: Convert to fraction form
    745/857 = 857/x
  3. Step 3: Cross multiply
    745x = 857 × 857
  4. Step 4: Simplify right side
    745x = 734,449
  5. Step 5: Solve for x
    x = 734,449/745
  6. Step 6: Final answer
    x = 985.84

Related Problems

Find third proportional to 372.50 and 428.50
Half scale
Find third proportional to 1,490 and 1,714
Double scale
Find third proportional to 747 and 859
Similar ratio
Find third proportional to 1,117.50 and 1,285.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.