Home / 515,813,115.58-711,819,067.56-280,863,213.50

Finding the Fourth Proportional to 515,813,115.58, 711,819,067.56 and 280,863,213.50

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Solution

The fourth proportional to 515,813,115.58, 711,819,067.56 and 280,863,213.50 is: 387,589,583.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,813,115.58 : 711,819,067.56 = 280,863,213.50 : x
  2. Step 2: Convert to fraction form
    515,813,115.58/711,819,067.56 = 280,863,213.50/x
  3. Step 3: Cross multiply
    515,813,115.58x = 711,819,067.56 × 280,863,213.50
  4. Step 4: Simplify right side
    515,813,115.58x = 199,923,790,745,475,200
  5. Step 5: Solve for x
    x = 199,923,790,745,475,200/515,813,115.58
  6. Step 6: Final answer
    x = 387,589,583.72

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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.