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Finding the Fourth Proportional to 664,458.80, 996,007.80 and 326,980.40

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Solution

The fourth proportional to 664,458.80, 996,007.80 and 326,980.40 is: 490,135.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,458.80 : 996,007.80 = 326,980.40 : x
  2. Step 2: Convert to fraction form
    664,458.80/996,007.80 = 326,980.40/x
  3. Step 3: Cross multiply
    664,458.80x = 996,007.80 × 326,980.40
  4. Step 4: Simplify right side
    664,458.80x = 325,675,028,847.12
  5. Step 5: Solve for x
    x = 325,675,028,847.12/664,458.80
  6. Step 6: Final answer
    x = 490,135.77

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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.