Home / 420.07-630.42-290.97

Finding the Fourth Proportional to 420.07, 630.42 and 290.97

Calculator

Solution

The fourth proportional to 420.07, 630.42 and 290.97 is: 436.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.07 : 630.42 = 290.97 : x
  2. Step 2: Convert to fraction form
    420.07/630.42 = 290.97/x
  3. Step 3: Cross multiply
    420.07x = 630.42 × 290.97
  4. Step 4: Simplify right side
    420.07x = 183,431.73
  5. Step 5: Solve for x
    x = 183,431.73/420.07
  6. Step 6: Final answer
    x = 436.67

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.