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Finding the Fourth Proportional to 412,728.60, 618,056.10 and 329,784.60

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Solution

The fourth proportional to 412,728.60, 618,056.10 and 329,784.60 is: 493,848.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,728.60 : 618,056.10 = 329,784.60 : x
  2. Step 2: Convert to fraction form
    412,728.60/618,056.10 = 329,784.60/x
  3. Step 3: Cross multiply
    412,728.60x = 618,056.10 × 329,784.60
  4. Step 4: Simplify right side
    412,728.60x = 203,825,383,716.06
  5. Step 5: Solve for x
    x = 203,825,383,716.06/412,728.60
  6. Step 6: Final answer
    x = 493,848.46

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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.