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Finding the Fourth Proportional to 485,442.17, 728,163.77 and 262,221.92

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Solution

The fourth proportional to 485,442.17, 728,163.77 and 262,221.92 is: 393,333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,442.17 : 728,163.77 = 262,221.92 : x
  2. Step 2: Convert to fraction form
    485,442.17/728,163.77 = 262,221.92/x
  3. Step 3: Cross multiply
    485,442.17x = 728,163.77 × 262,221.92
  4. Step 4: Simplify right side
    485,442.17x = 190,940,501,843.84
  5. Step 5: Solve for x
    x = 190,940,501,843.84/485,442.17
  6. Step 6: Final answer
    x = 393,333.16

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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.