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Finding the Fourth Proportional to 664,072.80, 994,921.20 and 403,936.80

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Solution

The fourth proportional to 664,072.80, 994,921.20 and 403,936.80 is: 605,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,072.80 : 994,921.20 = 403,936.80 : x
  2. Step 2: Convert to fraction form
    664,072.80/994,921.20 = 403,936.80/x
  3. Step 3: Cross multiply
    664,072.80x = 994,921.20 × 403,936.80
  4. Step 4: Simplify right side
    664,072.80x = 401,885,285,780.16
  5. Step 5: Solve for x
    x = 401,885,285,780.16/664,072.80
  6. Step 6: Final answer
    x = 605,182.57

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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.