Home / 261.60-392.44-139.80

Finding the Fourth Proportional to 261.60, 392.44 and 139.80

Calculator

Solution

The fourth proportional to 261.60, 392.44 and 139.80 is: 209.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.60 : 392.44 = 139.80 : x
  2. Step 2: Convert to fraction form
    261.60/392.44 = 139.80/x
  3. Step 3: Cross multiply
    261.60x = 392.44 × 139.80
  4. Step 4: Simplify right side
    261.60x = 54,863.11
  5. Step 5: Solve for x
    x = 54,863.11/261.60
  6. Step 6: Final answer
    x = 209.72

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.