Home / 820.31-1,132.02-488.75

Finding the Fourth Proportional to 820.31, 1,132.02 and 488.75

Calculator

Solution

The fourth proportional to 820.31, 1,132.02 and 488.75 is: 674.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.31 : 1,132.02 = 488.75 : x
  2. Step 2: Convert to fraction form
    820.31/1,132.02 = 488.75/x
  3. Step 3: Cross multiply
    820.31x = 1,132.02 × 488.75
  4. Step 4: Simplify right side
    820.31x = 553,269.11
  5. Step 5: Solve for x
    x = 553,269.11/820.31
  6. Step 6: Final answer
    x = 674.47

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.