Home / 369.87-554.85-138.75

Finding the Fourth Proportional to 369.87, 554.85 and 138.75

Calculator

Solution

The fourth proportional to 369.87, 554.85 and 138.75 is: 208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.87 : 554.85 = 138.75 : x
  2. Step 2: Convert to fraction form
    369.87/554.85 = 138.75/x
  3. Step 3: Cross multiply
    369.87x = 554.85 × 138.75
  4. Step 4: Simplify right side
    369.87x = 76,985.44
  5. Step 5: Solve for x
    x = 76,985.44/369.87
  6. Step 6: Final answer
    x = 208.14

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.