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Finding the Fourth Proportional to 395,046.72, 545,069.30 and 239,993.50

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Solution

The fourth proportional to 395,046.72, 545,069.30 and 239,993.50 is: 331,133.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,046.72 : 545,069.30 = 239,993.50 : x
  2. Step 2: Convert to fraction form
    395,046.72/545,069.30 = 239,993.50/x
  3. Step 3: Cross multiply
    395,046.72x = 545,069.30 × 239,993.50
  4. Step 4: Simplify right side
    395,046.72x = 130,813,089,049.55
  5. Step 5: Solve for x
    x = 130,813,089,049.55/395,046.72
  6. Step 6: Final answer
    x = 331,133.21

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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.