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Finding the Fourth Proportional to 308,784.60, 462,979.80 and 131,200.20

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Solution

The fourth proportional to 308,784.60, 462,979.80 and 131,200.20 is: 196,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,784.60 : 462,979.80 = 131,200.20 : x
  2. Step 2: Convert to fraction form
    308,784.60/462,979.80 = 131,200.20/x
  3. Step 3: Cross multiply
    308,784.60x = 462,979.80 × 131,200.20
  4. Step 4: Simplify right side
    308,784.60x = 60,743,042,355.96
  5. Step 5: Solve for x
    x = 60,743,042,355.96/308,784.60
  6. Step 6: Final answer
    x = 196,716.55

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1.5x scale

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.