Home / 200.76-301.32-128.70

Finding the Fourth Proportional to 200.76, 301.32 and 128.70

Calculator

Solution

The fourth proportional to 200.76, 301.32 and 128.70 is: 193.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.76 : 301.32 = 128.70 : x
  2. Step 2: Convert to fraction form
    200.76/301.32 = 128.70/x
  3. Step 3: Cross multiply
    200.76x = 301.32 × 128.70
  4. Step 4: Simplify right side
    200.76x = 38,779.88
  5. Step 5: Solve for x
    x = 38,779.88/200.76
  6. Step 6: Final answer
    x = 193.17

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.