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Finding the Fourth Proportional to 485,961.98, 728,893.76 and 131,011.88

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Solution

The fourth proportional to 485,961.98, 728,893.76 and 131,011.88 is: 196,504.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,961.98 : 728,893.76 = 131,011.88 : x
  2. Step 2: Convert to fraction form
    485,961.98/728,893.76 = 131,011.88/x
  3. Step 3: Cross multiply
    485,961.98x = 728,893.76 × 131,011.88
  4. Step 4: Simplify right side
    485,961.98x = 95,493,741,618.37
  5. Step 5: Solve for x
    x = 95,493,741,618.37/485,961.98
  6. Step 6: Final answer
    x = 196,504.55

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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.