Home / 213.40-319.29-117.28

Finding the Fourth Proportional to 213.40, 319.29 and 117.28

Calculator

Solution

The fourth proportional to 213.40, 319.29 and 117.28 is: 175.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.40 : 319.29 = 117.28 : x
  2. Step 2: Convert to fraction form
    213.40/319.29 = 117.28/x
  3. Step 3: Cross multiply
    213.40x = 319.29 × 117.28
  4. Step 4: Simplify right side
    213.40x = 37,446.33
  5. Step 5: Solve for x
    x = 37,446.33/213.40
  6. Step 6: Final answer
    x = 175.47

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.