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Finding the Fourth Proportional to 827,054.10, 1,238,940.90 and 728,420.40

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Solution

The fourth proportional to 827,054.10, 1,238,940.90 and 728,420.40 is: 1,091,185.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,054.10 : 1,238,940.90 = 728,420.40 : x
  2. Step 2: Convert to fraction form
    827,054.10/1,238,940.90 = 728,420.40/x
  3. Step 3: Cross multiply
    827,054.10x = 1,238,940.90 × 728,420.40
  4. Step 4: Simplify right side
    827,054.10x = 902,469,825,954.36
  5. Step 5: Solve for x
    x = 902,469,825,954.36/827,054.10
  6. Step 6: Final answer
    x = 1,091,185.96

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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.