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Finding the Fourth Proportional to 263,800.80, 395,422.32 and 86,260.32

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Solution

The fourth proportional to 263,800.80, 395,422.32 and 86,260.32 is: 129,299.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,800.80 : 395,422.32 = 86,260.32 : x
  2. Step 2: Convert to fraction form
    263,800.80/395,422.32 = 86,260.32/x
  3. Step 3: Cross multiply
    263,800.80x = 395,422.32 × 86,260.32
  4. Step 4: Simplify right side
    263,800.80x = 34,109,255,858.34
  5. Step 5: Solve for x
    x = 34,109,255,858.34/263,800.80
  6. Step 6: Final answer
    x = 129,299.29

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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.