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Finding the Fourth Proportional to 396,940.05, 547,779.90 and 215,651.94

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Solution

The fourth proportional to 396,940.05, 547,779.90 and 215,651.94 is: 297,601.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,940.05 : 547,779.90 = 215,651.94 : x
  2. Step 2: Convert to fraction form
    396,940.05/547,779.90 = 215,651.94/x
  3. Step 3: Cross multiply
    396,940.05x = 547,779.90 × 215,651.94
  4. Step 4: Simplify right side
    396,940.05x = 118,129,798,128.01
  5. Step 5: Solve for x
    x = 118,129,798,128.01/396,940.05
  6. Step 6: Final answer
    x = 297,601.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.