Home / 398,344-871,280

Finding the Third Proportional to 398,344 and 871,280

Calculator

Solution

The third proportional to 398,344 and 871,280 is: 1,905,711.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,344 : 871,280 = 871,280 : x
  2. Step 2: Convert to fraction form
    398,344/871,280 = 871,280/x
  3. Step 3: Cross multiply
    398,344x = 871,280 × 871,280
  4. Step 4: Simplify right side
    398,344x = 759,128,838,400
  5. Step 5: Solve for x
    x = 759,128,838,400/398,344
  6. Step 6: Final answer
    x = 1,905,711.74

Related Problems

Find third proportional to 199,172 and 435,640
Half scale
Find third proportional to 796,688 and 1,742,560
Double scale
Find third proportional to 398,346 and 871,284
Similar ratio
Find third proportional to 597,516 and 1,306,920
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.