Home / 428,183.69-642,273.57-108,338.58

Finding the Fourth Proportional to 428,183.69, 642,273.57 and 108,338.58

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Solution

The fourth proportional to 428,183.69, 642,273.57 and 108,338.58 is: 162,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,183.69 : 642,273.57 = 108,338.58 : x
  2. Step 2: Convert to fraction form
    428,183.69/642,273.57 = 108,338.58/x
  3. Step 3: Cross multiply
    428,183.69x = 642,273.57 × 108,338.58
  4. Step 4: Simplify right side
    428,183.69x = 69,583,006,545.33
  5. Step 5: Solve for x
    x = 69,583,006,545.33/428,183.69
  6. Step 6: Final answer
    x = 162,507.37

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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.