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Finding the Fourth Proportional to 396,709.80, 594,080.55 and 317,977.80

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Solution

The fourth proportional to 396,709.80, 594,080.55 and 317,977.80 is: 476,177.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,709.80 : 594,080.55 = 317,977.80 : x
  2. Step 2: Convert to fraction form
    396,709.80/594,080.55 = 317,977.80/x
  3. Step 3: Cross multiply
    396,709.80x = 594,080.55 × 317,977.80
  4. Step 4: Simplify right side
    396,709.80x = 188,904,426,311.79
  5. Step 5: Solve for x
    x = 188,904,426,311.79/396,709.80
  6. Step 6: Final answer
    x = 476,177.87

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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.