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Finding the Fourth Proportional to 386,576.48, 579,725.78 and 133,788.39

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Solution

The fourth proportional to 386,576.48, 579,725.78 and 133,788.39 is: 200,634.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,576.48 : 579,725.78 = 133,788.39 : x
  2. Step 2: Convert to fraction form
    386,576.48/579,725.78 = 133,788.39/x
  3. Step 3: Cross multiply
    386,576.48x = 579,725.78 × 133,788.39
  4. Step 4: Simplify right side
    386,576.48x = 77,560,578,078.75
  5. Step 5: Solve for x
    x = 77,560,578,078.75/386,576.48
  6. Step 6: Final answer
    x = 200,634.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.