Home / 428.83-643.34-360.79

Finding the Fourth Proportional to 428.83, 643.34 and 360.79

Calculator

Solution

The fourth proportional to 428.83, 643.34 and 360.79 is: 541.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.83 : 643.34 = 360.79 : x
  2. Step 2: Convert to fraction form
    428.83/643.34 = 360.79/x
  3. Step 3: Cross multiply
    428.83x = 643.34 × 360.79
  4. Step 4: Simplify right side
    428.83x = 232,109.93
  5. Step 5: Solve for x
    x = 232,109.93/428.83
  6. Step 6: Final answer
    x = 541.27

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.