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Finding the Fourth Proportional to 315,147.88, 434,906.85 and 171,908.56

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Solution

The fourth proportional to 315,147.88, 434,906.85 and 171,908.56 is: 237,235.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,147.88 : 434,906.85 = 171,908.56 : x
  2. Step 2: Convert to fraction form
    315,147.88/434,906.85 = 171,908.56/x
  3. Step 3: Cross multiply
    315,147.88x = 434,906.85 × 171,908.56
  4. Step 4: Simplify right side
    315,147.88x = 74,764,210,317.64
  5. Step 5: Solve for x
    x = 74,764,210,317.64/315,147.88
  6. Step 6: Final answer
    x = 237,235.33

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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.