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Finding the Fourth Proportional to 491,618.44, 678,446.57 and 276,766.66

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Solution

The fourth proportional to 491,618.44, 678,446.57 and 276,766.66 is: 381,945.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,618.44 : 678,446.57 = 276,766.66 : x
  2. Step 2: Convert to fraction form
    491,618.44/678,446.57 = 276,766.66/x
  3. Step 3: Cross multiply
    491,618.44x = 678,446.57 × 276,766.66
  4. Step 4: Simplify right side
    491,618.44x = 187,771,386,391.29
  5. Step 5: Solve for x
    x = 187,771,386,391.29/491,618.44
  6. Step 6: Final answer
    x = 381,945.37

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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.