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Finding the Fourth Proportional to 386,699.67, 580,049.51 and 120,481.70

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Solution

The fourth proportional to 386,699.67, 580,049.51 and 120,481.70 is: 180,722.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,699.67 : 580,049.51 = 120,481.70 : x
  2. Step 2: Convert to fraction form
    386,699.67/580,049.51 = 120,481.70/x
  3. Step 3: Cross multiply
    386,699.67x = 580,049.51 × 120,481.70
  4. Step 4: Simplify right side
    386,699.67x = 69,885,347,546.31
  5. Step 5: Solve for x
    x = 69,885,347,546.31/386,699.67
  6. Step 6: Final answer
    x = 180,722.54

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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.