Home / 681.01-939.78-386.28

Finding the Fourth Proportional to 681.01, 939.78 and 386.28

Calculator

Solution

The fourth proportional to 681.01, 939.78 and 386.28 is: 533.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.01 : 939.78 = 386.28 : x
  2. Step 2: Convert to fraction form
    681.01/939.78 = 386.28/x
  3. Step 3: Cross multiply
    681.01x = 939.78 × 386.28
  4. Step 4: Simplify right side
    681.01x = 363,018.22
  5. Step 5: Solve for x
    x = 363,018.22/681.01
  6. Step 6: Final answer
    x = 533.06

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.