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Finding the Fourth Proportional to 449,133.96, 619,806.26 and 287,989.64

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Solution

The fourth proportional to 449,133.96, 619,806.26 and 287,989.64 is: 397,426.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,133.96 : 619,806.26 = 287,989.64 : x
  2. Step 2: Convert to fraction form
    449,133.96/619,806.26 = 287,989.64/x
  3. Step 3: Cross multiply
    449,133.96x = 619,806.26 × 287,989.64
  4. Step 4: Simplify right side
    449,133.96x = 178,497,785,118.77
  5. Step 5: Solve for x
    x = 178,497,785,118.77/449,133.96
  6. Step 6: Final answer
    x = 397,426.61

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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.