Home / 643.50-960.54-552.78

Finding the Fourth Proportional to 643.50, 960.54 and 552.78

Calculator

Solution

The fourth proportional to 643.50, 960.54 and 552.78 is: 825.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.50 : 960.54 = 552.78 : x
  2. Step 2: Convert to fraction form
    643.50/960.54 = 552.78/x
  3. Step 3: Cross multiply
    643.50x = 960.54 × 552.78
  4. Step 4: Simplify right side
    643.50x = 530,967.30
  5. Step 5: Solve for x
    x = 530,967.30/643.50
  6. Step 6: Final answer
    x = 825.12

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.