Home / 864.75-1,218

Finding the Third Proportional to 864.75 and 1,218

Calculator

Solution

The third proportional to 864.75 and 1,218 is: 1,715.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.75 : 1,218 = 1,218 : x
  2. Step 2: Convert to fraction form
    864.75/1,218 = 1,218/x
  3. Step 3: Cross multiply
    864.75x = 1,218 × 1,218
  4. Step 4: Simplify right side
    864.75x = 1,483,524
  5. Step 5: Solve for x
    x = 1,483,524/864.75
  6. Step 6: Final answer
    x = 1,715.55

Related Problems

Find third proportional to 432.38 and 609
Half scale
Find third proportional to 1,729.50 and 2,436
Double scale
Find third proportional to 867 and 1,221
Similar ratio
Find third proportional to 1,297.13 and 1,827
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.