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Finding the Fourth Proportional to 664,361.20, 996,687.60 and 215,005.60

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Solution

The fourth proportional to 664,361.20, 996,687.60 and 215,005.60 is: 322,555.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,361.20 : 996,687.60 = 215,005.60 : x
  2. Step 2: Convert to fraction form
    664,361.20/996,687.60 = 215,005.60/x
  3. Step 3: Cross multiply
    664,361.20x = 996,687.60 × 215,005.60
  4. Step 4: Simplify right side
    664,361.20x = 214,293,415,450.56
  5. Step 5: Solve for x
    x = 214,293,415,450.56/664,361.20
  6. Step 6: Final answer
    x = 322,555.58

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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.