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Finding the Fourth Proportional to 323,647.08, 485,418.60 and 136,634.28

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Solution

The fourth proportional to 323,647.08, 485,418.60 and 136,634.28 is: 204,929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,647.08 : 485,418.60 = 136,634.28 : x
  2. Step 2: Convert to fraction form
    323,647.08/485,418.60 = 136,634.28/x
  3. Step 3: Cross multiply
    323,647.08x = 485,418.60 × 136,634.28
  4. Step 4: Simplify right side
    323,647.08x = 66,324,820,909.61
  5. Step 5: Solve for x
    x = 66,324,820,909.61/323,647.08
  6. Step 6: Final answer
    x = 204,929.46

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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.