Home / 423.90-631.23-422.10

Finding the Fourth Proportional to 423.90, 631.23 and 422.10

Calculator

Solution

The fourth proportional to 423.90, 631.23 and 422.10 is: 628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.90 : 631.23 = 422.10 : x
  2. Step 2: Convert to fraction form
    423.90/631.23 = 422.10/x
  3. Step 3: Cross multiply
    423.90x = 631.23 × 422.10
  4. Step 4: Simplify right side
    423.90x = 266,442.18
  5. Step 5: Solve for x
    x = 266,442.18/423.90
  6. Step 6: Final answer
    x = 628.55

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.