Home / 308,278-462,417-86,662

Finding the Fourth Proportional to 308,278, 462,417 and 86,662

Calculator

Solution

The fourth proportional to 308,278, 462,417 and 86,662 is: 129,993

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,278 : 462,417 = 86,662 : x
  2. Step 2: Convert to fraction form
    308,278/462,417 = 86,662/x
  3. Step 3: Cross multiply
    308,278x = 462,417 × 86,662
  4. Step 4: Simplify right side
    308,278x = 40,073,982,054
  5. Step 5: Solve for x
    x = 40,073,982,054/308,278
  6. Step 6: Final answer
    x = 129,993

Related Problems

Find fourth proportional to 154,139, 231,208.50 and 43,331
Half scale
Find fourth proportional to 616,556, 924,834 and 173,324
Double scale
Find fourth proportional to 308,279, 462,418.50 and 86,663
Similar ratio
Find fourth proportional to 462,417, 693,625.50 and 129,993
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.