Home / 257,971-390,851

Finding the Third Proportional to 257,971 and 390,851

Calculator

Solution

The third proportional to 257,971 and 390,851 is: 592,177.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,971 : 390,851 = 390,851 : x
  2. Step 2: Convert to fraction form
    257,971/390,851 = 390,851/x
  3. Step 3: Cross multiply
    257,971x = 390,851 × 390,851
  4. Step 4: Simplify right side
    257,971x = 152,764,504,201
  5. Step 5: Solve for x
    x = 152,764,504,201/257,971
  6. Step 6: Final answer
    x = 592,177.04

Related Problems

Find third proportional to 128,985.50 and 195,425.50
Half scale
Find third proportional to 515,942 and 781,702
Double scale
Find third proportional to 257,973 and 390,854
Similar ratio
Find third proportional to 386,956.50 and 586,276.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.