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Finding the Fourth Proportional to 425,940.69, 639,155.25 and 173,174.52

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Solution

The fourth proportional to 425,940.69, 639,155.25 and 173,174.52 is: 259,861.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,940.69 : 639,155.25 = 173,174.52 : x
  2. Step 2: Convert to fraction form
    425,940.69/639,155.25 = 173,174.52/x
  3. Step 3: Cross multiply
    425,940.69x = 639,155.25 × 173,174.52
  4. Step 4: Simplify right side
    425,940.69x = 110,685,403,624.23
  5. Step 5: Solve for x
    x = 110,685,403,624.23/425,940.69
  6. Step 6: Final answer
    x = 259,861.07

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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.