Home / 1,378.42-1,902.06-788.92

Finding the Fourth Proportional to 1,378.42, 1,902.06 and 788.92

Calculator

Solution

The fourth proportional to 1,378.42, 1,902.06 and 788.92 is: 1,088.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.42 : 1,902.06 = 788.92 : x
  2. Step 2: Convert to fraction form
    1,378.42/1,902.06 = 788.92/x
  3. Step 3: Cross multiply
    1,378.42x = 1,902.06 × 788.92
  4. Step 4: Simplify right side
    1,378.42x = 1,500,573.18
  5. Step 5: Solve for x
    x = 1,500,573.18/1,378.42
  6. Step 6: Final answer
    x = 1,088.62

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.