Home / 128,457-284,449.50

Finding the Third Proportional to 128,457 and 284,449.50

Calculator

Solution

The third proportional to 128,457 and 284,449.50 is: 629,872.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,457 : 284,449.50 = 284,449.50 : x
  2. Step 2: Convert to fraction form
    128,457/284,449.50 = 284,449.50/x
  3. Step 3: Cross multiply
    128,457x = 284,449.50 × 284,449.50
  4. Step 4: Simplify right side
    128,457x = 80,911,518,050.25
  5. Step 5: Solve for x
    x = 80,911,518,050.25/128,457
  6. Step 6: Final answer
    x = 629,872.39

Related Problems

Find third proportional to 64,228.50 and 142,224.75
Half scale
Find third proportional to 256,914 and 568,899
Double scale
Find third proportional to 128,459 and 284,454
Similar ratio
Find third proportional to 192,685.50 and 426,674.25
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.