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Finding the Fourth Proportional to 218,759.90, 327,629.98 and 211,183.31

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Solution

The fourth proportional to 218,759.90, 327,629.98 and 211,183.31 is: 316,282.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,759.90 : 327,629.98 = 211,183.31 : x
  2. Step 2: Convert to fraction form
    218,759.90/327,629.98 = 211,183.31/x
  3. Step 3: Cross multiply
    218,759.90x = 327,629.98 × 211,183.31
  4. Step 4: Simplify right side
    218,759.90x = 69,189,983,631.63
  5. Step 5: Solve for x
    x = 69,189,983,631.63/218,759.90
  6. Step 6: Final answer
    x = 316,282.75

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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.