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Finding the Fourth Proportional to 519,676.40, 717,648.67 and 491,372.87

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Solution

The fourth proportional to 519,676.40, 717,648.67 and 491,372.87 is: 678,562.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,676.40 : 717,648.67 = 491,372.87 : x
  2. Step 2: Convert to fraction form
    519,676.40/717,648.67 = 491,372.87/x
  3. Step 3: Cross multiply
    519,676.40x = 717,648.67 × 491,372.87
  4. Step 4: Simplify right side
    519,676.40x = 352,633,086,629.58
  5. Step 5: Solve for x
    x = 352,633,086,629.58/519,676.40
  6. Step 6: Final answer
    x = 678,562.83

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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.