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Finding the Fourth Proportional to 481,190.50, 664,217.86 and 279,986.50

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Solution

The fourth proportional to 481,190.50, 664,217.86 and 279,986.50 is: 386,483.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,190.50 : 664,217.86 = 279,986.50 : x
  2. Step 2: Convert to fraction form
    481,190.50/664,217.86 = 279,986.50/x
  3. Step 3: Cross multiply
    481,190.50x = 664,217.86 × 279,986.50
  4. Step 4: Simplify right side
    481,190.50x = 185,972,033,858.89
  5. Step 5: Solve for x
    x = 185,972,033,858.89/481,190.50
  6. Step 6: Final answer
    x = 386,483.18

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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.