Home / 456.38-629.80-281.72

Finding the Fourth Proportional to 456.38, 629.80 and 281.72

Calculator

Solution

The fourth proportional to 456.38, 629.80 and 281.72 is: 388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.38 : 629.80 = 281.72 : x
  2. Step 2: Convert to fraction form
    456.38/629.80 = 281.72/x
  3. Step 3: Cross multiply
    456.38x = 629.80 × 281.72
  4. Step 4: Simplify right side
    456.38x = 177,428.13
  5. Step 5: Solve for x
    x = 177,428.13/456.38
  6. Step 6: Final answer
    x = 388.78

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.