Home / 643.52-965.04-278.48

Finding the Fourth Proportional to 643.52, 965.04 and 278.48

Calculator

Solution

The fourth proportional to 643.52, 965.04 and 278.48 is: 417.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.52 : 965.04 = 278.48 : x
  2. Step 2: Convert to fraction form
    643.52/965.04 = 278.48/x
  3. Step 3: Cross multiply
    643.52x = 965.04 × 278.48
  4. Step 4: Simplify right side
    643.52x = 268,744.34
  5. Step 5: Solve for x
    x = 268,744.34/643.52
  6. Step 6: Final answer
    x = 417.62

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.