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Finding the Fourth Proportional to 381,251.20, 526,118.40 and 211,481.60

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Solution

The fourth proportional to 381,251.20, 526,118.40 and 211,481.60 is: 291,840.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,251.20 : 526,118.40 = 211,481.60 : x
  2. Step 2: Convert to fraction form
    381,251.20/526,118.40 = 211,481.60/x
  3. Step 3: Cross multiply
    381,251.20x = 526,118.40 × 211,481.60
  4. Step 4: Simplify right side
    381,251.20x = 111,264,361,021.44
  5. Step 5: Solve for x
    x = 111,264,361,021.44/381,251.20
  6. Step 6: Final answer
    x = 291,840.03

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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.