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Finding the Fourth Proportional to 491,446.85, 678,218.47 and 276,600.83

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Solution

The fourth proportional to 491,446.85, 678,218.47 and 276,600.83 is: 381,721.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,446.85 : 678,218.47 = 276,600.83 : x
  2. Step 2: Convert to fraction form
    491,446.85/678,218.47 = 276,600.83/x
  3. Step 3: Cross multiply
    491,446.85x = 678,218.47 × 276,600.83
  4. Step 4: Simplify right side
    491,446.85x = 187,595,787,640.74
  5. Step 5: Solve for x
    x = 187,595,787,640.74/491,446.85
  6. Step 6: Final answer
    x = 381,721.42

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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.