Home / 285,355-427,140

Finding the Third Proportional to 285,355 and 427,140

Calculator

Solution

The third proportional to 285,355 and 427,140 is: 639,374.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,355 : 427,140 = 427,140 : x
  2. Step 2: Convert to fraction form
    285,355/427,140 = 427,140/x
  3. Step 3: Cross multiply
    285,355x = 427,140 × 427,140
  4. Step 4: Simplify right side
    285,355x = 182,448,579,600
  5. Step 5: Solve for x
    x = 182,448,579,600/285,355
  6. Step 6: Final answer
    x = 639,374.04

Related Problems

Find third proportional to 142,677.50 and 213,570
Half scale
Find third proportional to 570,710 and 854,280
Double scale
Find third proportional to 285,357 and 427,143
Similar ratio
Find third proportional to 428,032.50 and 640,710
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.