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Finding the Fourth Proportional to 491,359.91, 678,076.36 and 276,500.16

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Solution

The fourth proportional to 491,359.91, 678,076.36 and 276,500.16 is: 381,570.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,359.91 : 678,076.36 = 276,500.16 : x
  2. Step 2: Convert to fraction form
    491,359.91/678,076.36 = 276,500.16/x
  3. Step 3: Cross multiply
    491,359.91x = 678,076.36 × 276,500.16
  4. Step 4: Simplify right side
    491,359.91x = 187,488,221,340.97
  5. Step 5: Solve for x
    x = 187,488,221,340.97/491,359.91
  6. Step 6: Final answer
    x = 381,570.05

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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.