Home / 1,159.59-1,738.17-428.70

Finding the Fourth Proportional to 1,159.59, 1,738.17 and 428.70

Calculator

Solution

The fourth proportional to 1,159.59, 1,738.17 and 428.70 is: 642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.59 : 1,738.17 = 428.70 : x
  2. Step 2: Convert to fraction form
    1,159.59/1,738.17 = 428.70/x
  3. Step 3: Cross multiply
    1,159.59x = 1,738.17 × 428.70
  4. Step 4: Simplify right side
    1,159.59x = 745,153.48
  5. Step 5: Solve for x
    x = 745,153.48/1,159.59
  6. Step 6: Final answer
    x = 642.60

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.