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Finding the Fourth Proportional to 481,221.76, 663,933.36 and 279,978.88

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Solution

The fourth proportional to 481,221.76, 663,933.36 and 279,978.88 is: 386,282.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,221.76 : 663,933.36 = 279,978.88 : x
  2. Step 2: Convert to fraction form
    481,221.76/663,933.36 = 279,978.88/x
  3. Step 3: Cross multiply
    481,221.76x = 663,933.36 × 279,978.88
  4. Step 4: Simplify right side
    481,221.76x = 185,887,318,527.44
  5. Step 5: Solve for x
    x = 185,887,318,527.44/481,221.76
  6. Step 6: Final answer
    x = 386,282.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.