Home / 989.66-1,481.79-715.07

Finding the Fourth Proportional to 989.66, 1,481.79 and 715.07

Calculator

Solution

The fourth proportional to 989.66, 1,481.79 and 715.07 is: 1,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.66 : 1,481.79 = 715.07 : x
  2. Step 2: Convert to fraction form
    989.66/1,481.79 = 715.07/x
  3. Step 3: Cross multiply
    989.66x = 1,481.79 × 715.07
  4. Step 4: Simplify right side
    989.66x = 1,059,583.58
  5. Step 5: Solve for x
    x = 1,059,583.58/989.66
  6. Step 6: Final answer
    x = 1,070.65

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.