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Finding the Fourth Proportional to 396,628.09, 595,178.53 and 143,928.29

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Solution

The fourth proportional to 396,628.09, 595,178.53 and 143,928.29 is: 215,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,628.09 : 595,178.53 = 143,928.29 : x
  2. Step 2: Convert to fraction form
    396,628.09/595,178.53 = 143,928.29/x
  3. Step 3: Cross multiply
    396,628.09x = 595,178.53 × 143,928.29
  4. Step 4: Simplify right side
    396,628.09x = 85,663,029,195.74
  5. Step 5: Solve for x
    x = 85,663,029,195.74/396,628.09
  6. Step 6: Final answer
    x = 215,978.22

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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.