Home / 286.34-428.78-240.57

Finding the Fourth Proportional to 286.34, 428.78 and 240.57

Calculator

Solution

The fourth proportional to 286.34, 428.78 and 240.57 is: 360.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.34 : 428.78 = 240.57 : x
  2. Step 2: Convert to fraction form
    286.34/428.78 = 240.57/x
  3. Step 3: Cross multiply
    286.34x = 428.78 × 240.57
  4. Step 4: Simplify right side
    286.34x = 103,152.21
  5. Step 5: Solve for x
    x = 103,152.21/286.34
  6. Step 6: Final answer
    x = 360.25

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.