Home / 1,187.79-1,781.70-418.11

Finding the Fourth Proportional to 1,187.79, 1,781.70 and 418.11

Calculator

Solution

The fourth proportional to 1,187.79, 1,781.70 and 418.11 is: 627.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.79 : 1,781.70 = 418.11 : x
  2. Step 2: Convert to fraction form
    1,187.79/1,781.70 = 418.11/x
  3. Step 3: Cross multiply
    1,187.79x = 1,781.70 × 418.11
  4. Step 4: Simplify right side
    1,187.79x = 744,946.59
  5. Step 5: Solve for x
    x = 744,946.59/1,187.79
  6. Step 6: Final answer
    x = 627.17

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.