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Finding the Fourth Proportional to 323,979.60, 485,969.40 and 205,735.80

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Solution

The fourth proportional to 323,979.60, 485,969.40 and 205,735.80 is: 308,603.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,979.60 : 485,969.40 = 205,735.80 : x
  2. Step 2: Convert to fraction form
    323,979.60/485,969.40 = 205,735.80/x
  3. Step 3: Cross multiply
    323,979.60x = 485,969.40 × 205,735.80
  4. Step 4: Simplify right side
    323,979.60x = 99,981,303,284.52
  5. Step 5: Solve for x
    x = 99,981,303,284.52/323,979.60
  6. Step 6: Final answer
    x = 308,603.70

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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.