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Finding the Fourth Proportional to 203,908.60, 305,862.90 and 171,431.65

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Solution

The fourth proportional to 203,908.60, 305,862.90 and 171,431.65 is: 257,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,908.60 : 305,862.90 = 171,431.65 : x
  2. Step 2: Convert to fraction form
    203,908.60/305,862.90 = 171,431.65/x
  3. Step 3: Cross multiply
    203,908.60x = 305,862.90 × 171,431.65
  4. Step 4: Simplify right side
    203,908.60x = 52,434,581,620.79
  5. Step 5: Solve for x
    x = 52,434,581,620.79/203,908.60
  6. Step 6: Final answer
    x = 257,147.48

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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.