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Finding the Fourth Proportional to 298,383,352.88, 408,786,651.63 and 287,200,025.87

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Solution

The fourth proportional to 298,383,352.88, 408,786,651.63 and 287,200,025.87 is: 393,465,438.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,383,352.88 : 408,786,651.63 = 287,200,025.87 : x
  2. Step 2: Convert to fraction form
    298,383,352.88/408,786,651.63 = 287,200,025.87/x
  3. Step 3: Cross multiply
    298,383,352.88x = 408,786,651.63 × 287,200,025.87
  4. Step 4: Simplify right side
    298,383,352.88x = 117,403,536,921,402,752
  5. Step 5: Solve for x
    x = 117,403,536,921,402,752/298,383,352.88
  6. Step 6: Final answer
    x = 393,465,438.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.