Home / 912.79-1,369.01-392.88

Finding the Fourth Proportional to 912.79, 1,369.01 and 392.88

Calculator

Solution

The fourth proportional to 912.79, 1,369.01 and 392.88 is: 589.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.79 : 1,369.01 = 392.88 : x
  2. Step 2: Convert to fraction form
    912.79/1,369.01 = 392.88/x
  3. Step 3: Cross multiply
    912.79x = 1,369.01 × 392.88
  4. Step 4: Simplify right side
    912.79x = 537,856.65
  5. Step 5: Solve for x
    x = 537,856.65/912.79
  6. Step 6: Final answer
    x = 589.24

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.