Home / 252.81-379.20-70.21

Finding the Fourth Proportional to 252.81, 379.20 and 70.21

Calculator

Solution

The fourth proportional to 252.81, 379.20 and 70.21 is: 105.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.81 : 379.20 = 70.21 : x
  2. Step 2: Convert to fraction form
    252.81/379.20 = 70.21/x
  3. Step 3: Cross multiply
    252.81x = 379.20 × 70.21
  4. Step 4: Simplify right side
    252.81x = 26,623.63
  5. Step 5: Solve for x
    x = 26,623.63/252.81
  6. Step 6: Final answer
    x = 105.31

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.