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Finding the Fourth Proportional to 263,793.60, 395,680.80 and 105,979.20

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Solution

The fourth proportional to 263,793.60, 395,680.80 and 105,979.20 is: 158,964.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,793.60 : 395,680.80 = 105,979.20 : x
  2. Step 2: Convert to fraction form
    263,793.60/395,680.80 = 105,979.20/x
  3. Step 3: Cross multiply
    263,793.60x = 395,680.80 × 105,979.20
  4. Step 4: Simplify right side
    263,793.60x = 41,933,934,639.36
  5. Step 5: Solve for x
    x = 41,933,934,639.36/263,793.60
  6. Step 6: Final answer
    x = 158,964.94

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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.