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Finding the Fourth Proportional to 496,891.21, 685,694.89 and 276,127.75

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Solution

The fourth proportional to 496,891.21, 685,694.89 and 276,127.75 is: 381,047.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,891.21 : 685,694.89 = 276,127.75 : x
  2. Step 2: Convert to fraction form
    496,891.21/685,694.89 = 276,127.75/x
  3. Step 3: Cross multiply
    496,891.21x = 685,694.89 × 276,127.75
  4. Step 4: Simplify right side
    496,891.21x = 189,339,387,333.10
  5. Step 5: Solve for x
    x = 189,339,387,333.10/496,891.21
  6. Step 6: Final answer
    x = 381,047.97

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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.