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Finding the Fourth Proportional to 491,377.28, 678,092.80 and 276,517.28

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Solution

The fourth proportional to 491,377.28, 678,092.80 and 276,517.28 is: 381,589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,377.28 : 678,092.80 = 276,517.28 : x
  2. Step 2: Convert to fraction form
    491,377.28/678,092.80 = 276,517.28/x
  3. Step 3: Cross multiply
    491,377.28x = 678,092.80 × 276,517.28
  4. Step 4: Simplify right side
    491,377.28x = 187,504,376,643.58
  5. Step 5: Solve for x
    x = 187,504,376,643.58/491,377.28
  6. Step 6: Final answer
    x = 381,589.43

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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.