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Finding the Fourth Proportional to 386,676.71, 579,876.66 and 133,889.31

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Solution

The fourth proportional to 386,676.71, 579,876.66 and 133,889.31 is: 200,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,676.71 : 579,876.66 = 133,889.31 : x
  2. Step 2: Convert to fraction form
    386,676.71/579,876.66 = 133,889.31/x
  3. Step 3: Cross multiply
    386,676.71x = 579,876.66 × 133,889.31
  4. Step 4: Simplify right side
    386,676.71x = 77,639,287,146.84
  5. Step 5: Solve for x
    x = 77,639,287,146.84/386,676.71
  6. Step 6: Final answer
    x = 200,786.05

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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.