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Finding the Fourth Proportional to 258,517.08, 356,787.60 and 145,361.64

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Solution

The fourth proportional to 258,517.08, 356,787.60 and 145,361.64 is: 200,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,517.08 : 356,787.60 = 145,361.64 : x
  2. Step 2: Convert to fraction form
    258,517.08/356,787.60 = 145,361.64/x
  3. Step 3: Cross multiply
    258,517.08x = 356,787.60 × 145,361.64
  4. Step 4: Simplify right side
    258,517.08x = 51,863,230,667.66
  5. Step 5: Solve for x
    x = 51,863,230,667.66/258,517.08
  6. Step 6: Final answer
    x = 200,618.20

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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.