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Finding the Fourth Proportional to 641,863.86, 962,997.09 and 385,990.98

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Solution

The fourth proportional to 641,863.86, 962,997.09 and 385,990.98 is: 579,107.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,863.86 : 962,997.09 = 385,990.98 : x
  2. Step 2: Convert to fraction form
    641,863.86/962,997.09 = 385,990.98/x
  3. Step 3: Cross multiply
    641,863.86x = 962,997.09 × 385,990.98
  4. Step 4: Simplify right side
    641,863.86x = 371,708,190,506.25
  5. Step 5: Solve for x
    x = 371,708,190,506.25/641,863.86
  6. Step 6: Final answer
    x = 579,107.52

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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.