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Finding the Fourth Proportional to 388,358.44, 536,099.82 and 261,107.80

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Solution

The fourth proportional to 388,358.44, 536,099.82 and 261,107.80 is: 360,439.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,358.44 : 536,099.82 = 261,107.80 : x
  2. Step 2: Convert to fraction form
    388,358.44/536,099.82 = 261,107.80/x
  3. Step 3: Cross multiply
    388,358.44x = 536,099.82 × 261,107.80
  4. Step 4: Simplify right side
    388,358.44x = 139,979,844,580.60
  5. Step 5: Solve for x
    x = 139,979,844,580.60/388,358.44
  6. Step 6: Final answer
    x = 360,439.82

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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.