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Finding the Fourth Proportional to 327,542.70, 491,259.09 and 90,909.42

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Solution

The fourth proportional to 327,542.70, 491,259.09 and 90,909.42 is: 136,348.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,542.70 : 491,259.09 = 90,909.42 : x
  2. Step 2: Convert to fraction form
    327,542.70/491,259.09 = 90,909.42/x
  3. Step 3: Cross multiply
    327,542.70x = 491,259.09 × 90,909.42
  4. Step 4: Simplify right side
    327,542.70x = 44,660,078,941.63
  5. Step 5: Solve for x
    x = 44,660,078,941.63/327,542.70
  6. Step 6: Final answer
    x = 136,348.88

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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.