Home / 911.60-1,258.08-518.65

Finding the Fourth Proportional to 911.60, 1,258.08 and 518.65

Calculator

Solution

The fourth proportional to 911.60, 1,258.08 and 518.65 is: 715.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.60 : 1,258.08 = 518.65 : x
  2. Step 2: Convert to fraction form
    911.60/1,258.08 = 518.65/x
  3. Step 3: Cross multiply
    911.60x = 1,258.08 × 518.65
  4. Step 4: Simplify right side
    911.60x = 652,508.10
  5. Step 5: Solve for x
    x = 652,508.10/911.60
  6. Step 6: Final answer
    x = 715.78

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.