Home / 430.76-646.38-156.81

Finding the Fourth Proportional to 430.76, 646.38 and 156.81

Calculator

Solution

The fourth proportional to 430.76, 646.38 and 156.81 is: 235.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.76 : 646.38 = 156.81 : x
  2. Step 2: Convert to fraction form
    430.76/646.38 = 156.81/x
  3. Step 3: Cross multiply
    430.76x = 646.38 × 156.81
  4. Step 4: Simplify right side
    430.76x = 101,359.45
  5. Step 5: Solve for x
    x = 101,359.45/430.76
  6. Step 6: Final answer
    x = 235.31

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.