Home / 308,270-462,405-86,654

Finding the Fourth Proportional to 308,270, 462,405 and 86,654

Calculator

Solution

The fourth proportional to 308,270, 462,405 and 86,654 is: 129,981

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,270 : 462,405 = 86,654 : x
  2. Step 2: Convert to fraction form
    308,270/462,405 = 86,654/x
  3. Step 3: Cross multiply
    308,270x = 462,405 × 86,654
  4. Step 4: Simplify right side
    308,270x = 40,069,242,870
  5. Step 5: Solve for x
    x = 40,069,242,870/308,270
  6. Step 6: Final answer
    x = 129,981

Related Problems

Find fourth proportional to 154,135, 231,202.50 and 43,327
Half scale
Find fourth proportional to 616,540, 924,810 and 173,308
Double scale
Find fourth proportional to 308,271, 462,406.50 and 86,655
Similar ratio
Find fourth proportional to 462,405, 693,607.50 and 129,981
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.