Home / 491-871

Finding the Third Proportional to 491 and 871

Calculator

Solution

The third proportional to 491 and 871 is: 1,545.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    491 : 871 = 871 : x
  2. Step 2: Convert to fraction form
    491/871 = 871/x
  3. Step 3: Cross multiply
    491x = 871 × 871
  4. Step 4: Simplify right side
    491x = 758,641
  5. Step 5: Solve for x
    x = 758,641/491
  6. Step 6: Final answer
    x = 1,545.09

Related Problems

Find third proportional to 245.50 and 435.50
Half scale
Find third proportional to 982 and 1,742
Double scale
Find third proportional to 493 and 875
Similar ratio
Find third proportional to 736.50 and 1,306.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.