Home / 428,788-630,336

Finding the Third Proportional to 428,788 and 630,336

Calculator

Solution

The third proportional to 428,788 and 630,336 is: 926,619.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,788 : 630,336 = 630,336 : x
  2. Step 2: Convert to fraction form
    428,788/630,336 = 630,336/x
  3. Step 3: Cross multiply
    428,788x = 630,336 × 630,336
  4. Step 4: Simplify right side
    428,788x = 397,323,472,896
  5. Step 5: Solve for x
    x = 397,323,472,896/428,788
  6. Step 6: Final answer
    x = 926,619.85

Related Problems

Find third proportional to 214,394 and 315,168
Half scale
Find third proportional to 857,576 and 1,260,672
Double scale
Find third proportional to 428,790 and 630,339
Similar ratio
Find third proportional to 643,182 and 945,504
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.