Home / 327,638.40-491,433.30-138,049.80

Finding the Fourth Proportional to 327,638.40, 491,433.30 and 138,049.80

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Solution

The fourth proportional to 327,638.40, 491,433.30 and 138,049.80 is: 207,064.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,638.40 : 491,433.30 = 138,049.80 : x
  2. Step 2: Convert to fraction form
    327,638.40/491,433.30 = 138,049.80/x
  3. Step 3: Cross multiply
    327,638.40x = 491,433.30 × 138,049.80
  4. Step 4: Simplify right side
    327,638.40x = 67,842,268,778.34
  5. Step 5: Solve for x
    x = 67,842,268,778.34/327,638.40
  6. Step 6: Final answer
    x = 207,064.46

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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.