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Finding the Fourth Proportional to 396,879.30, 595,318.95 and 318,147.30

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Solution

The fourth proportional to 396,879.30, 595,318.95 and 318,147.30 is: 477,220.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,879.30 : 595,318.95 = 318,147.30 : x
  2. Step 2: Convert to fraction form
    396,879.30/595,318.95 = 318,147.30/x
  3. Step 3: Cross multiply
    396,879.30x = 595,318.95 × 318,147.30
  4. Step 4: Simplify right side
    396,879.30x = 189,399,116,581.34
  5. Step 5: Solve for x
    x = 189,399,116,581.34/396,879.30
  6. Step 6: Final answer
    x = 477,220.95

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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.