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Finding the Fourth Proportional to 298,383,377.64, 408,786,685.80 and 287,200,051.56

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Solution

The fourth proportional to 298,383,377.64, 408,786,685.80 and 287,200,051.56 is: 393,465,474.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,383,377.64 : 408,786,685.80 = 287,200,051.56 : x
  2. Step 2: Convert to fraction form
    298,383,377.64/408,786,685.80 = 287,200,051.56/x
  3. Step 3: Cross multiply
    298,383,377.64x = 408,786,685.80 × 287,200,051.56
  4. Step 4: Simplify right side
    298,383,377.64x = 117,403,557,238,801,520
  5. Step 5: Solve for x
    x = 117,403,557,238,801,520/298,383,377.64
  6. Step 6: Final answer
    x = 393,465,474.41

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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.