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Finding the Fourth Proportional to 278,628.30, 384,568.29 and 183,143.88

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Solution

The fourth proportional to 278,628.30, 384,568.29 and 183,143.88 is: 252,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,628.30 : 384,568.29 = 183,143.88 : x
  2. Step 2: Convert to fraction form
    278,628.30/384,568.29 = 183,143.88/x
  3. Step 3: Cross multiply
    278,628.30x = 384,568.29 × 183,143.88
  4. Step 4: Simplify right side
    278,628.30x = 70,431,328,755.57
  5. Step 5: Solve for x
    x = 70,431,328,755.57/278,628.30
  6. Step 6: Final answer
    x = 252,778.81

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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.