Home / 387.83-581.76-127.71

Finding the Fourth Proportional to 387.83, 581.76 and 127.71

Calculator

Solution

The fourth proportional to 387.83, 581.76 and 127.71 is: 191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.83 : 581.76 = 127.71 : x
  2. Step 2: Convert to fraction form
    387.83/581.76 = 127.71/x
  3. Step 3: Cross multiply
    387.83x = 581.76 × 127.71
  4. Step 4: Simplify right side
    387.83x = 74,296.57
  5. Step 5: Solve for x
    x = 74,296.57/387.83
  6. Step 6: Final answer
    x = 191.57

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.