Home / 398,258-630,930

Finding the Third Proportional to 398,258 and 630,930

Calculator

Solution

The third proportional to 398,258 and 630,930 is: 999,534.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,258 : 630,930 = 630,930 : x
  2. Step 2: Convert to fraction form
    398,258/630,930 = 630,930/x
  3. Step 3: Cross multiply
    398,258x = 630,930 × 630,930
  4. Step 4: Simplify right side
    398,258x = 398,072,664,900
  5. Step 5: Solve for x
    x = 398,072,664,900/398,258
  6. Step 6: Final answer
    x = 999,534.64

Related Problems

Find third proportional to 199,129 and 315,465
Half scale
Find third proportional to 796,516 and 1,261,860
Double scale
Find third proportional to 398,260 and 630,933
Similar ratio
Find third proportional to 597,387 and 946,395
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.