Home / 422.61-583.23-312.45

Finding the Fourth Proportional to 422.61, 583.23 and 312.45

Calculator

Solution

The fourth proportional to 422.61, 583.23 and 312.45 is: 431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.61 : 583.23 = 312.45 : x
  2. Step 2: Convert to fraction form
    422.61/583.23 = 312.45/x
  3. Step 3: Cross multiply
    422.61x = 583.23 × 312.45
  4. Step 4: Simplify right side
    422.61x = 182,230.21
  5. Step 5: Solve for x
    x = 182,230.21/422.61
  6. Step 6: Final answer
    x = 431.20

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.