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Finding the Fourth Proportional to 3,456,978.31, 4,770,630.92 and 1,908,240.87

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Solution

The fourth proportional to 3,456,978.31, 4,770,630.92 and 1,908,240.87 is: 2,633,372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,456,978.31 : 4,770,630.92 = 1,908,240.87 : x
  2. Step 2: Convert to fraction form
    3,456,978.31/4,770,630.92 = 1,908,240.87/x
  3. Step 3: Cross multiply
    3,456,978.31x = 4,770,630.92 × 1,908,240.87
  4. Step 4: Simplify right side
    3,456,978.31x = 9,103,512,897,229.70
  5. Step 5: Solve for x
    x = 9,103,512,897,229.70/3,456,978.31
  6. Step 6: Final answer
    x = 2,633,372.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.