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Finding the Fourth Proportional to 664,375.92, 996,913.78 and 290,661.36

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Solution

The fourth proportional to 664,375.92, 996,913.78 and 290,661.36 is: 436,145.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,375.92 : 996,913.78 = 290,661.36 : x
  2. Step 2: Convert to fraction form
    664,375.92/996,913.78 = 290,661.36/x
  3. Step 3: Cross multiply
    664,375.92x = 996,913.78 × 290,661.36
  4. Step 4: Simplify right side
    664,375.92x = 289,764,315,097.54
  5. Step 5: Solve for x
    x = 289,764,315,097.54/664,375.92
  6. Step 6: Final answer
    x = 436,145.12

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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.