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Finding the Fourth Proportional to 396,638.61, 595,194.30 and 143,938.83

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Solution

The fourth proportional to 396,638.61, 595,194.30 and 143,938.83 is: 215,994.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,638.61 : 595,194.30 = 143,938.83 : x
  2. Step 2: Convert to fraction form
    396,638.61/595,194.30 = 143,938.83/x
  3. Step 3: Cross multiply
    396,638.61x = 595,194.30 × 143,938.83
  4. Step 4: Simplify right side
    396,638.61x = 85,671,571,164.67
  5. Step 5: Solve for x
    x = 85,671,571,164.67/396,638.61
  6. Step 6: Final answer
    x = 215,994.03

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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.