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Finding the Fourth Proportional to 263,716.80, 395,866.80 and 163,989.60

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Solution

The fourth proportional to 263,716.80, 395,866.80 and 163,989.60 is: 246,165.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,716.80 : 395,866.80 = 163,989.60 : x
  2. Step 2: Convert to fraction form
    263,716.80/395,866.80 = 163,989.60/x
  3. Step 3: Cross multiply
    263,716.80x = 395,866.80 × 163,989.60
  4. Step 4: Simplify right side
    263,716.80x = 64,918,038,185.28
  5. Step 5: Solve for x
    x = 64,918,038,185.28/263,716.80
  6. Step 6: Final answer
    x = 246,165.73

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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.