Home / 451-860

Finding the Third Proportional to 451 and 860

Calculator

Solution

The third proportional to 451 and 860 is: 1,639.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    451 : 860 = 860 : x
  2. Step 2: Convert to fraction form
    451/860 = 860/x
  3. Step 3: Cross multiply
    451x = 860 × 860
  4. Step 4: Simplify right side
    451x = 739,600
  5. Step 5: Solve for x
    x = 739,600/451
  6. Step 6: Final answer
    x = 1,639.91

Related Problems

Find third proportional to 225.50 and 430
Half scale
Find third proportional to 902 and 1,720
Double scale
Find third proportional to 453 and 864
Similar ratio
Find third proportional to 676.50 and 1,290
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.