Home / 743.70-1,115.46-256.80

Finding the Fourth Proportional to 743.70, 1,115.46 and 256.80

Calculator

Solution

The fourth proportional to 743.70, 1,115.46 and 256.80 is: 385.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.70 : 1,115.46 = 256.80 : x
  2. Step 2: Convert to fraction form
    743.70/1,115.46 = 256.80/x
  3. Step 3: Cross multiply
    743.70x = 1,115.46 × 256.80
  4. Step 4: Simplify right side
    743.70x = 286,450.13
  5. Step 5: Solve for x
    x = 286,450.13/743.70
  6. Step 6: Final answer
    x = 385.17

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.