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Finding the Fourth Proportional to 386,179.92, 579,390.84 and 173,126.43

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Solution

The fourth proportional to 386,179.92, 579,390.84 and 173,126.43 is: 259,743.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,179.92 : 579,390.84 = 173,126.43 : x
  2. Step 2: Convert to fraction form
    386,179.92/579,390.84 = 173,126.43/x
  3. Step 3: Cross multiply
    386,179.92x = 579,390.84 × 173,126.43
  4. Step 4: Simplify right side
    386,179.92x = 100,307,867,703.90
  5. Step 5: Solve for x
    x = 100,307,867,703.90/386,179.92
  6. Step 6: Final answer
    x = 259,743.87

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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.