Home / 257,008-395,520

Finding the Third Proportional to 257,008 and 395,520

Calculator

Solution

The third proportional to 257,008 and 395,520 is: 608,681.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,008 : 395,520 = 395,520 : x
  2. Step 2: Convert to fraction form
    257,008/395,520 = 395,520/x
  3. Step 3: Cross multiply
    257,008x = 395,520 × 395,520
  4. Step 4: Simplify right side
    257,008x = 156,436,070,400
  5. Step 5: Solve for x
    x = 156,436,070,400/257,008
  6. Step 6: Final answer
    x = 608,681.72

Related Problems

Find third proportional to 128,504 and 197,760
Half scale
Find third proportional to 514,016 and 791,040
Double scale
Find third proportional to 257,010 and 395,523
Similar ratio
Find third proportional to 385,512 and 593,280
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.