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Finding the Fourth Proportional to 327,638.86, 491,458.48 and 90,981.56

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Solution

The fourth proportional to 327,638.86, 491,458.48 and 90,981.56 is: 136,472.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,638.86 : 491,458.48 = 90,981.56 : x
  2. Step 2: Convert to fraction form
    327,638.86/491,458.48 = 90,981.56/x
  3. Step 3: Cross multiply
    327,638.86x = 491,458.48 × 90,981.56
  4. Step 4: Simplify right side
    327,638.86x = 44,713,659,185.63
  5. Step 5: Solve for x
    x = 44,713,659,185.63/327,638.86
  6. Step 6: Final answer
    x = 136,472.39

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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.