Home / 345-475.86-213.78

Finding the Fourth Proportional to 345, 475.86 and 213.78

Calculator

Solution

The fourth proportional to 345, 475.86 and 213.78 is: 294.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    345 : 475.86 = 213.78 : x
  2. Step 2: Convert to fraction form
    345/475.86 = 213.78/x
  3. Step 3: Cross multiply
    345x = 475.86 × 213.78
  4. Step 4: Simplify right side
    345x = 101,729.35
  5. Step 5: Solve for x
    x = 101,729.35/345
  6. Step 6: Final answer
    x = 294.87

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.