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Finding the Fourth Proportional to 491,645.54, 678,468.89 and 276,786.02

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Solution

The fourth proportional to 491,645.54, 678,468.89 and 276,786.02 is: 381,963.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,645.54 : 678,468.89 = 276,786.02 : x
  2. Step 2: Convert to fraction form
    491,645.54/678,468.89 = 276,786.02/x
  3. Step 3: Cross multiply
    491,645.54x = 678,468.89 × 276,786.02
  4. Step 4: Simplify right side
    491,645.54x = 187,790,702,372.99
  5. Step 5: Solve for x
    x = 187,790,702,372.99/491,645.54
  6. Step 6: Final answer
    x = 381,963.60

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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.