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Finding the Fourth Proportional to 628,993,676.80, 943,490,515.20 and 445,327,667.20

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Solution

The fourth proportional to 628,993,676.80, 943,490,515.20 and 445,327,667.20 is: 667,991,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,993,676.80 : 943,490,515.20 = 445,327,667.20 : x
  2. Step 2: Convert to fraction form
    628,993,676.80/943,490,515.20 = 445,327,667.20/x
  3. Step 3: Cross multiply
    628,993,676.80x = 943,490,515.20 × 445,327,667.20
  4. Step 4: Simplify right side
    628,993,676.80x = 420,162,430,159,342,144
  5. Step 5: Solve for x
    x = 420,162,430,159,342,144/628,993,676.80
  6. Step 6: Final answer
    x = 667,991,500.80

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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.