Home / 389,912.76-538,049.58-220,163.64

Finding the Fourth Proportional to 389,912.76, 538,049.58 and 220,163.64

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Solution

The fourth proportional to 389,912.76, 538,049.58 and 220,163.64 is: 303,808.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,912.76 : 538,049.58 = 220,163.64 : x
  2. Step 2: Convert to fraction form
    389,912.76/538,049.58 = 220,163.64/x
  3. Step 3: Cross multiply
    389,912.76x = 538,049.58 × 220,163.64
  4. Step 4: Simplify right side
    389,912.76x = 118,458,954,033.27
  5. Step 5: Solve for x
    x = 118,458,954,033.27/389,912.76
  6. Step 6: Final answer
    x = 303,808.87

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1.5x scale

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.