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Finding the Fourth Proportional to 263,396.59, 395,054.79 and 85,903.31

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Solution

The fourth proportional to 263,396.59, 395,054.79 and 85,903.31 is: 128,841.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,396.59 : 395,054.79 = 85,903.31 : x
  2. Step 2: Convert to fraction form
    263,396.59/395,054.79 = 85,903.31/x
  3. Step 3: Cross multiply
    263,396.59x = 395,054.79 × 85,903.31
  4. Step 4: Simplify right side
    263,396.59x = 33,936,514,757.85
  5. Step 5: Solve for x
    x = 33,936,514,757.85/263,396.59
  6. Step 6: Final answer
    x = 128,841.89

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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.