Home / 285.47-395.60-280.00

Finding the Fourth Proportional to 285.47, 395.60 and 280.00

Calculator

Solution

The fourth proportional to 285.47, 395.60 and 280.00 is: 388.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.47 : 395.60 = 280.00 : x
  2. Step 2: Convert to fraction form
    285.47/395.60 = 280.00/x
  3. Step 3: Cross multiply
    285.47x = 395.60 × 280.00
  4. Step 4: Simplify right side
    285.47x = 110,764.62
  5. Step 5: Solve for x
    x = 110,764.62/285.47
  6. Step 6: Final answer
    x = 388.01

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.