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Finding the Fourth Proportional to 323,601.39, 485,020.85 and 145,900.35

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Solution

The fourth proportional to 323,601.39, 485,020.85 and 145,900.35 is: 218,678.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,601.39 : 485,020.85 = 145,900.35 : x
  2. Step 2: Convert to fraction form
    323,601.39/485,020.85 = 145,900.35/x
  3. Step 3: Cross multiply
    323,601.39x = 485,020.85 × 145,900.35
  4. Step 4: Simplify right side
    323,601.39x = 70,764,711,042.80
  5. Step 5: Solve for x
    x = 70,764,711,042.80/323,601.39
  6. Step 6: Final answer
    x = 218,678.64

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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.