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Finding the Fourth Proportional to 279,957.60, 419,936.40 and 102,405.60

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Solution

The fourth proportional to 279,957.60, 419,936.40 and 102,405.60 is: 153,608.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,957.60 : 419,936.40 = 102,405.60 : x
  2. Step 2: Convert to fraction form
    279,957.60/419,936.40 = 102,405.60/x
  3. Step 3: Cross multiply
    279,957.60x = 419,936.40 × 102,405.60
  4. Step 4: Simplify right side
    279,957.60x = 43,003,839,003.84
  5. Step 5: Solve for x
    x = 43,003,839,003.84/279,957.60
  6. Step 6: Final answer
    x = 153,608.40

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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.