Home / 885.35-1,221.80-492.40

Finding the Fourth Proportional to 885.35, 1,221.80 and 492.40

Calculator

Solution

The fourth proportional to 885.35, 1,221.80 and 492.40 is: 679.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.35 : 1,221.80 = 492.40 : x
  2. Step 2: Convert to fraction form
    885.35/1,221.80 = 492.40/x
  3. Step 3: Cross multiply
    885.35x = 1,221.80 × 492.40
  4. Step 4: Simplify right side
    885.35x = 601,608.80
  5. Step 5: Solve for x
    x = 601,608.80/885.35
  6. Step 6: Final answer
    x = 679.52

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.