Home / 637.65-954.86-420.57

Finding the Fourth Proportional to 637.65, 954.86 and 420.57

Calculator

Solution

The fourth proportional to 637.65, 954.86 and 420.57 is: 629.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.65 : 954.86 = 420.57 : x
  2. Step 2: Convert to fraction form
    637.65/954.86 = 420.57/x
  3. Step 3: Cross multiply
    637.65x = 954.86 × 420.57
  4. Step 4: Simplify right side
    637.65x = 401,583.37
  5. Step 5: Solve for x
    x = 401,583.37/637.65
  6. Step 6: Final answer
    x = 629.79

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.