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Finding the Fourth Proportional to 388,712.36, 536,239.78 and 227,468.52

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Solution

The fourth proportional to 388,712.36, 536,239.78 and 227,468.52 is: 313,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,712.36 : 536,239.78 = 227,468.52 : x
  2. Step 2: Convert to fraction form
    388,712.36/536,239.78 = 227,468.52/x
  3. Step 3: Cross multiply
    388,712.36x = 536,239.78 × 227,468.52
  4. Step 4: Simplify right side
    388,712.36x = 121,977,669,121.73
  5. Step 5: Solve for x
    x = 121,977,669,121.73/388,712.36
  6. Step 6: Final answer
    x = 313,799.31

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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.