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Finding the Fourth Proportional to 491,435.16, 678,179.88 and 276,576.78

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Solution

The fourth proportional to 491,435.16, 678,179.88 and 276,576.78 is: 381,675.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,435.16 : 678,179.88 = 276,576.78 : x
  2. Step 2: Convert to fraction form
    491,435.16/678,179.88 = 276,576.78/x
  3. Step 3: Cross multiply
    491,435.16x = 678,179.88 × 276,576.78
  4. Step 4: Simplify right side
    491,435.16x = 187,568,807,471.19
  5. Step 5: Solve for x
    x = 187,568,807,471.19/491,435.16
  6. Step 6: Final answer
    x = 381,675.60

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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.