Home / 430.29-645.57-141.75

Finding the Fourth Proportional to 430.29, 645.57 and 141.75

Calculator

Solution

The fourth proportional to 430.29, 645.57 and 141.75 is: 212.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.29 : 645.57 = 141.75 : x
  2. Step 2: Convert to fraction form
    430.29/645.57 = 141.75/x
  3. Step 3: Cross multiply
    430.29x = 645.57 × 141.75
  4. Step 4: Simplify right side
    430.29x = 91,509.55
  5. Step 5: Solve for x
    x = 91,509.55/430.29
  6. Step 6: Final answer
    x = 212.67

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.