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Finding the Fourth Proportional to 323,837.20, 484,978.20 and 261,629.20

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Solution

The fourth proportional to 323,837.20, 484,978.20 and 261,629.20 is: 391,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,837.20 : 484,978.20 = 261,629.20 : x
  2. Step 2: Convert to fraction form
    323,837.20/484,978.20 = 261,629.20/x
  3. Step 3: Cross multiply
    323,837.20x = 484,978.20 × 261,629.20
  4. Step 4: Simplify right side
    323,837.20x = 126,884,458,483.44
  5. Step 5: Solve for x
    x = 126,884,458,483.44/323,837.20
  6. Step 6: Final answer
    x = 391,815.57

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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.