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Finding the Fourth Proportional to 485,583.86, 728,450.82 and 165,660.80

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Solution

The fourth proportional to 485,583.86, 728,450.82 and 165,660.80 is: 248,516.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,583.86 : 728,450.82 = 165,660.80 : x
  2. Step 2: Convert to fraction form
    485,583.86/728,450.82 = 165,660.80/x
  3. Step 3: Cross multiply
    485,583.86x = 728,450.82 × 165,660.80
  4. Step 4: Simplify right side
    485,583.86x = 120,675,741,959.60
  5. Step 5: Solve for x
    x = 120,675,741,959.60/485,583.86
  6. Step 6: Final answer
    x = 248,516.79

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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.