Home / 405,822-630,838

Finding the Third Proportional to 405,822 and 630,838

Calculator

Solution

The third proportional to 405,822 and 630,838 is: 980,618.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,822 : 630,838 = 630,838 : x
  2. Step 2: Convert to fraction form
    405,822/630,838 = 630,838/x
  3. Step 3: Cross multiply
    405,822x = 630,838 × 630,838
  4. Step 4: Simplify right side
    405,822x = 397,956,582,244
  5. Step 5: Solve for x
    x = 397,956,582,244/405,822
  6. Step 6: Final answer
    x = 980,618.55

Related Problems

Find third proportional to 202,911 and 315,419
Half scale
Find third proportional to 811,644 and 1,261,676
Double scale
Find third proportional to 405,824 and 630,841
Similar ratio
Find third proportional to 608,733 and 946,257
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.