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Finding the Fourth Proportional to 305,855.50, 422,080.60 and 171,719.50

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Solution

The fourth proportional to 305,855.50, 422,080.60 and 171,719.50 is: 236,972.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,855.50 : 422,080.60 = 171,719.50 : x
  2. Step 2: Convert to fraction form
    305,855.50/422,080.60 = 171,719.50/x
  3. Step 3: Cross multiply
    305,855.50x = 422,080.60 × 171,719.50
  4. Step 4: Simplify right side
    305,855.50x = 72,479,469,591.70
  5. Step 5: Solve for x
    x = 72,479,469,591.70/305,855.50
  6. Step 6: Final answer
    x = 236,972.92

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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.