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Finding the Fourth Proportional to 449,133.75, 619,805.98 and 287,989.44

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Solution

The fourth proportional to 449,133.75, 619,805.98 and 287,989.44 is: 397,426.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,133.75 : 619,805.98 = 287,989.44 : x
  2. Step 2: Convert to fraction form
    449,133.75/619,805.98 = 287,989.44/x
  3. Step 3: Cross multiply
    449,133.75x = 619,805.98 × 287,989.44
  4. Step 4: Simplify right side
    449,133.75x = 178,497,573,269.85
  5. Step 5: Solve for x
    x = 178,497,573,269.85/449,133.75
  6. Step 6: Final answer
    x = 397,426.32

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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.