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Finding the Fourth Proportional to 263,811.60, 395,772.76 and 86,304.88

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Solution

The fourth proportional to 263,811.60, 395,772.76 and 86,304.88 is: 129,475.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,811.60 : 395,772.76 = 86,304.88 : x
  2. Step 2: Convert to fraction form
    263,811.60/395,772.76 = 86,304.88/x
  3. Step 3: Cross multiply
    263,811.60x = 395,772.76 × 86,304.88
  4. Step 4: Simplify right side
    263,811.60x = 34,157,120,559.07
  5. Step 5: Solve for x
    x = 34,157,120,559.07/263,811.60
  6. Step 6: Final answer
    x = 129,475.43

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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.