Home / 256,691-399,037

Finding the Third Proportional to 256,691 and 399,037

Calculator

Solution

The third proportional to 256,691 and 399,037 is: 620,319.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,691 : 399,037 = 399,037 : x
  2. Step 2: Convert to fraction form
    256,691/399,037 = 399,037/x
  3. Step 3: Cross multiply
    256,691x = 399,037 × 399,037
  4. Step 4: Simplify right side
    256,691x = 159,230,527,369
  5. Step 5: Solve for x
    x = 159,230,527,369/256,691
  6. Step 6: Final answer
    x = 620,319.87

Related Problems

Find third proportional to 128,345.50 and 199,518.50
Half scale
Find third proportional to 513,382 and 798,074
Double scale
Find third proportional to 256,693 and 399,040
Similar ratio
Find third proportional to 385,036.50 and 598,555.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.