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Finding the Fourth Proportional to 408,563.54, 611,753.79 and 239,945.30

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Solution

The fourth proportional to 408,563.54, 611,753.79 and 239,945.30 is: 359,276.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,563.54 : 611,753.79 = 239,945.30 : x
  2. Step 2: Convert to fraction form
    408,563.54/611,753.79 = 239,945.30/x
  3. Step 3: Cross multiply
    408,563.54x = 611,753.79 × 239,945.30
  4. Step 4: Simplify right side
    408,563.54x = 146,787,446,667.69
  5. Step 5: Solve for x
    x = 146,787,446,667.69/408,563.54
  6. Step 6: Final answer
    x = 359,276.91

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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.