Home / 257,280-395,904

Finding the Third Proportional to 257,280 and 395,904

Calculator

Solution

The third proportional to 257,280 and 395,904 is: 609,219.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,280 : 395,904 = 395,904 : x
  2. Step 2: Convert to fraction form
    257,280/395,904 = 395,904/x
  3. Step 3: Cross multiply
    257,280x = 395,904 × 395,904
  4. Step 4: Simplify right side
    257,280x = 156,739,977,216
  5. Step 5: Solve for x
    x = 156,739,977,216/257,280
  6. Step 6: Final answer
    x = 609,219.44

Related Problems

Find third proportional to 128,640 and 197,952
Half scale
Find third proportional to 514,560 and 791,808
Double scale
Find third proportional to 257,282 and 395,907
Similar ratio
Find third proportional to 385,920 and 593,856
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.