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Finding the Fourth Proportional to 639,801.60, 959,132 and 324,096

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Solution

The fourth proportional to 639,801.60, 959,132 and 324,096 is: 485,855.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,801.60 : 959,132 = 324,096 : x
  2. Step 2: Convert to fraction form
    639,801.60/959,132 = 324,096/x
  3. Step 3: Cross multiply
    639,801.60x = 959,132 × 324,096
  4. Step 4: Simplify right side
    639,801.60x = 310,850,844,672
  5. Step 5: Solve for x
    x = 310,850,844,672/639,801.60
  6. Step 6: Final answer
    x = 485,855.06

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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.