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Finding the Fourth Proportional to 667,930.91, 999,531.33 and 415,330.36

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Solution

The fourth proportional to 667,930.91, 999,531.33 and 415,330.36 is: 621,524.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,930.91 : 999,531.33 = 415,330.36 : x
  2. Step 2: Convert to fraction form
    667,930.91/999,531.33 = 415,330.36/x
  3. Step 3: Cross multiply
    667,930.91x = 999,531.33 × 415,330.36
  4. Step 4: Simplify right side
    667,930.91x = 415,135,704,832.44
  5. Step 5: Solve for x
    x = 415,135,704,832.44/667,930.91
  6. Step 6: Final answer
    x = 621,524.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.