Home / 3,989.80-5,984.69-1,216.49

Finding the Fourth Proportional to 3,989.80, 5,984.69 and 1,216.49

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Solution

The fourth proportional to 3,989.80, 5,984.69 and 1,216.49 is: 1,824.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.80 : 5,984.69 = 1,216.49 : x
  2. Step 2: Convert to fraction form
    3,989.80/5,984.69 = 1,216.49/x
  3. Step 3: Cross multiply
    3,989.80x = 5,984.69 × 1,216.49
  4. Step 4: Simplify right side
    3,989.80x = 7,280,324.42
  5. Step 5: Solve for x
    x = 7,280,324.42/3,989.80
  6. Step 6: Final answer
    x = 1,824.74

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1.5x scale

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.