Home / 421,548-642,828

Finding the Third Proportional to 421,548 and 642,828

Calculator

Solution

The third proportional to 421,548 and 642,828 is: 980,262.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,548 : 642,828 = 642,828 : x
  2. Step 2: Convert to fraction form
    421,548/642,828 = 642,828/x
  3. Step 3: Cross multiply
    421,548x = 642,828 × 642,828
  4. Step 4: Simplify right side
    421,548x = 413,227,837,584
  5. Step 5: Solve for x
    x = 413,227,837,584/421,548
  6. Step 6: Final answer
    x = 980,262.84

Related Problems

Find third proportional to 210,774 and 321,414
Half scale
Find third proportional to 843,096 and 1,285,656
Double scale
Find third proportional to 421,550 and 642,831
Similar ratio
Find third proportional to 632,322 and 964,242
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.