Home / 128,376-280,080

Finding the Third Proportional to 128,376 and 280,080

Calculator

Solution

The third proportional to 128,376 and 280,080 is: 611,055.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,376 : 280,080 = 280,080 : x
  2. Step 2: Convert to fraction form
    128,376/280,080 = 280,080/x
  3. Step 3: Cross multiply
    128,376x = 280,080 × 280,080
  4. Step 4: Simplify right side
    128,376x = 78,444,806,400
  5. Step 5: Solve for x
    x = 78,444,806,400/128,376
  6. Step 6: Final answer
    x = 611,055.08

Related Problems

Find third proportional to 64,188 and 140,040
Half scale
Find third proportional to 256,752 and 560,160
Double scale
Find third proportional to 128,378 and 280,084
Similar ratio
Find third proportional to 192,564 and 420,120
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.