Home / 128,440-204,557

Finding the Third Proportional to 128,440 and 204,557

Calculator

Solution

The third proportional to 128,440 and 204,557 is: 325,782.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440 : 204,557 = 204,557 : x
  2. Step 2: Convert to fraction form
    128,440/204,557 = 204,557/x
  3. Step 3: Cross multiply
    128,440x = 204,557 × 204,557
  4. Step 4: Simplify right side
    128,440x = 41,843,566,249
  5. Step 5: Solve for x
    x = 41,843,566,249/128,440
  6. Step 6: Final answer
    x = 325,782.98

Related Problems

Find third proportional to 64,220 and 102,278.50
Half scale
Find third proportional to 256,880 and 409,114
Double scale
Find third proportional to 128,442 and 204,560
Similar ratio
Find third proportional to 192,660 and 306,835.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.