Home / 40.70-56.19-30.98

Finding the Fourth Proportional to 40.70, 56.19 and 30.98

Calculator

Solution

The fourth proportional to 40.70, 56.19 and 30.98 is: 42.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.70 : 56.19 = 30.98 : x
  2. Step 2: Convert to fraction form
    40.70/56.19 = 30.98/x
  3. Step 3: Cross multiply
    40.70x = 56.19 × 30.98
  4. Step 4: Simplify right side
    40.70x = 1,740.49
  5. Step 5: Solve for x
    x = 1,740.49/40.70
  6. Step 6: Final answer
    x = 42.77

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.