Home / 817.80-1,128.56-468.48

Finding the Fourth Proportional to 817.80, 1,128.56 and 468.48

Calculator

Solution

The fourth proportional to 817.80, 1,128.56 and 468.48 is: 646.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.80 : 1,128.56 = 468.48 : x
  2. Step 2: Convert to fraction form
    817.80/1,128.56 = 468.48/x
  3. Step 3: Cross multiply
    817.80x = 1,128.56 × 468.48
  4. Step 4: Simplify right side
    817.80x = 528,707.79
  5. Step 5: Solve for x
    x = 528,707.79/817.80
  6. Step 6: Final answer
    x = 646.50

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.