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Finding the Fourth Proportional to 664,078.80, 994,930.20 and 403,942.80

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Solution

The fourth proportional to 664,078.80, 994,930.20 and 403,942.80 is: 605,191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,078.80 : 994,930.20 = 403,942.80 : x
  2. Step 2: Convert to fraction form
    664,078.80/994,930.20 = 403,942.80/x
  3. Step 3: Cross multiply
    664,078.80x = 994,930.20 × 403,942.80
  4. Step 4: Simplify right side
    664,078.80x = 401,894,890,792.56
  5. Step 5: Solve for x
    x = 401,894,890,792.56/664,078.80
  6. Step 6: Final answer
    x = 605,191.57

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1.5x scale

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.