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Finding the Fourth Proportional to 481,399.58, 664,305.08 and 287,811.20

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Solution

The fourth proportional to 481,399.58, 664,305.08 and 287,811.20 is: 397,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,399.58 : 664,305.08 = 287,811.20 : x
  2. Step 2: Convert to fraction form
    481,399.58/664,305.08 = 287,811.20/x
  3. Step 3: Cross multiply
    481,399.58x = 664,305.08 × 287,811.20
  4. Step 4: Simplify right side
    481,399.58x = 191,194,442,240.90
  5. Step 5: Solve for x
    x = 191,194,442,240.90/481,399.58
  6. Step 6: Final answer
    x = 397,163.71

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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.