Home / 190.15-285.53-129.40

Finding the Fourth Proportional to 190.15, 285.53 and 129.40

Calculator

Solution

The fourth proportional to 190.15, 285.53 and 129.40 is: 194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.15 : 285.53 = 129.40 : x
  2. Step 2: Convert to fraction form
    190.15/285.53 = 129.40/x
  3. Step 3: Cross multiply
    190.15x = 285.53 × 129.40
  4. Step 4: Simplify right side
    190.15x = 36,946.22
  5. Step 5: Solve for x
    x = 36,946.22/190.15
  6. Step 6: Final answer
    x = 194.30

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.