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Finding the Fourth Proportional to 388,366.44, 536,110.86 and 261,115.80

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Solution

The fourth proportional to 388,366.44, 536,110.86 and 261,115.80 is: 360,450.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,366.44 : 536,110.86 = 261,115.80 : x
  2. Step 2: Convert to fraction form
    388,366.44/536,110.86 = 261,115.80/x
  3. Step 3: Cross multiply
    388,366.44x = 536,110.86 × 261,115.80
  4. Step 4: Simplify right side
    388,366.44x = 139,987,016,097.59
  5. Step 5: Solve for x
    x = 139,987,016,097.59/388,366.44
  6. Step 6: Final answer
    x = 360,450.86

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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.