Home / 647.88-1,421.88

Finding the Third Proportional to 647.88 and 1,421.88

Calculator

Solution

The third proportional to 647.88 and 1,421.88 is: 3,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.88 : 1,421.88 = 1,421.88 : x
  2. Step 2: Convert to fraction form
    647.88/1,421.88 = 1,421.88/x
  3. Step 3: Cross multiply
    647.88x = 1,421.88 × 1,421.88
  4. Step 4: Simplify right side
    647.88x = 2,021,728.52
  5. Step 5: Solve for x
    x = 2,021,728.52/647.88
  6. Step 6: Final answer
    x = 3,120.55

Related Problems

Find third proportional to 323.94 and 710.94
Half scale
Find third proportional to 1,295.75 and 2,843.75
Double scale
Find third proportional to 650 and 1,426
Similar ratio
Find third proportional to 971.81 and 2,132.81
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.