Home / 316,770-638,724

Finding the Third Proportional to 316,770 and 638,724

Calculator

Solution

The third proportional to 316,770 and 638,724 is: 1,287,900.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,770 : 638,724 = 638,724 : x
  2. Step 2: Convert to fraction form
    316,770/638,724 = 638,724/x
  3. Step 3: Cross multiply
    316,770x = 638,724 × 638,724
  4. Step 4: Simplify right side
    316,770x = 407,968,348,176
  5. Step 5: Solve for x
    x = 407,968,348,176/316,770
  6. Step 6: Final answer
    x = 1,287,900.84

Related Problems

Find third proportional to 158,385 and 319,362
Half scale
Find third proportional to 633,540 and 1,277,448
Double scale
Find third proportional to 316,772 and 638,728
Similar ratio
Find third proportional to 475,155 and 958,086
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.