Home / 491,987.88-678,909.06-290,745

Finding the Fourth Proportional to 491,987.88, 678,909.06 and 290,745

Calculator

Solution

The fourth proportional to 491,987.88, 678,909.06 and 290,745 is: 401,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,987.88 : 678,909.06 = 290,745 : x
  2. Step 2: Convert to fraction form
    491,987.88/678,909.06 = 290,745/x
  3. Step 3: Cross multiply
    491,987.88x = 678,909.06 × 290,745
  4. Step 4: Simplify right side
    491,987.88x = 197,389,414,649.70
  5. Step 5: Solve for x
    x = 197,389,414,649.70/491,987.88
  6. Step 6: Final answer
    x = 401,207.88

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.