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Finding the Fourth Proportional to 263,786.40, 395,679.60 and 86,250.60

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Solution

The fourth proportional to 263,786.40, 395,679.60 and 86,250.60 is: 129,375.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,786.40 : 395,679.60 = 86,250.60 : x
  2. Step 2: Convert to fraction form
    263,786.40/395,679.60 = 86,250.60/x
  3. Step 3: Cross multiply
    263,786.40x = 395,679.60 × 86,250.60
  4. Step 4: Simplify right side
    263,786.40x = 34,127,602,907.76
  5. Step 5: Solve for x
    x = 34,127,602,907.76/263,786.40
  6. Step 6: Final answer
    x = 129,375.90

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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.