Home / 428,875-630,836

Finding the Third Proportional to 428,875 and 630,836

Calculator

Solution

The third proportional to 428,875 and 630,836 is: 927,902.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,875 : 630,836 = 630,836 : x
  2. Step 2: Convert to fraction form
    428,875/630,836 = 630,836/x
  3. Step 3: Cross multiply
    428,875x = 630,836 × 630,836
  4. Step 4: Simplify right side
    428,875x = 397,954,058,896
  5. Step 5: Solve for x
    x = 397,954,058,896/428,875
  6. Step 6: Final answer
    x = 927,902.21

Related Problems

Find third proportional to 214,437.50 and 315,418
Half scale
Find third proportional to 857,750 and 1,261,672
Double scale
Find third proportional to 428,877 and 630,839
Similar ratio
Find third proportional to 643,312.50 and 946,254
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.