Home / 505-868

Finding the Third Proportional to 505 and 868

Calculator

Solution

The third proportional to 505 and 868 is: 1,491.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    505 : 868 = 868 : x
  2. Step 2: Convert to fraction form
    505/868 = 868/x
  3. Step 3: Cross multiply
    505x = 868 × 868
  4. Step 4: Simplify right side
    505x = 753,424
  5. Step 5: Solve for x
    x = 753,424/505
  6. Step 6: Final answer
    x = 1,491.93

Related Problems

Find third proportional to 252.50 and 434
Half scale
Find third proportional to 1,010 and 1,736
Double scale
Find third proportional to 507 and 871
Similar ratio
Find third proportional to 757.50 and 1,302
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.