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Finding the Fourth Proportional to 263,887.48, 395,904.78 and 86,405.80

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Solution

The fourth proportional to 263,887.48, 395,904.78 and 86,405.80 is: 129,632.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,887.48 : 395,904.78 = 86,405.80 : x
  2. Step 2: Convert to fraction form
    263,887.48/395,904.78 = 86,405.80/x
  3. Step 3: Cross multiply
    263,887.48x = 395,904.78 × 86,405.80
  4. Step 4: Simplify right side
    263,887.48x = 34,208,469,239.72
  5. Step 5: Solve for x
    x = 34,208,469,239.72/263,887.48
  6. Step 6: Final answer
    x = 129,632.79

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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.