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Finding the Fourth Proportional to 396,907.80, 593,903.70 and 291,931.80

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Solution

The fourth proportional to 396,907.80, 593,903.70 and 291,931.80 is: 436,825.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,907.80 : 593,903.70 = 291,931.80 : x
  2. Step 2: Convert to fraction form
    396,907.80/593,903.70 = 291,931.80/x
  3. Step 3: Cross multiply
    396,907.80x = 593,903.70 × 291,931.80
  4. Step 4: Simplify right side
    396,907.80x = 173,379,376,167.66
  5. Step 5: Solve for x
    x = 173,379,376,167.66/396,907.80
  6. Step 6: Final answer
    x = 436,825.32

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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.