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Finding the Fourth Proportional to 381,439.80, 572,815.80 and 248,907.60

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Solution

The fourth proportional to 381,439.80, 572,815.80 and 248,907.60 is: 373,789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,439.80 : 572,815.80 = 248,907.60 : x
  2. Step 2: Convert to fraction form
    381,439.80/572,815.80 = 248,907.60/x
  3. Step 3: Cross multiply
    381,439.80x = 572,815.80 × 248,907.60
  4. Step 4: Simplify right side
    381,439.80x = 142,578,206,020.08
  5. Step 5: Solve for x
    x = 142,578,206,020.08/381,439.80
  6. Step 6: Final answer
    x = 373,789.54

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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.