Home / 853-917

Finding the Third Proportional to 853 and 917

Calculator

Solution

The third proportional to 853 and 917 is: 985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    853 : 917 = 917 : x
  2. Step 2: Convert to fraction form
    853/917 = 917/x
  3. Step 3: Cross multiply
    853x = 917 × 917
  4. Step 4: Simplify right side
    853x = 840,889
  5. Step 5: Solve for x
    x = 840,889/853
  6. Step 6: Final answer
    x = 985.80

Related Problems

Find third proportional to 426.50 and 458.50
Half scale
Find third proportional to 1,706 and 1,834
Double scale
Find third proportional to 855 and 919
Similar ratio
Find third proportional to 1,279.50 and 1,375.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.