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Finding the Fourth Proportional to 664,456.80, 996,004.80 and 326,978.40

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Solution

The fourth proportional to 664,456.80, 996,004.80 and 326,978.40 is: 490,132.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,456.80 : 996,004.80 = 326,978.40 : x
  2. Step 2: Convert to fraction form
    664,456.80/996,004.80 = 326,978.40/x
  3. Step 3: Cross multiply
    664,456.80x = 996,004.80 × 326,978.40
  4. Step 4: Simplify right side
    664,456.80x = 325,672,055,896.32
  5. Step 5: Solve for x
    x = 325,672,055,896.32/664,456.80
  6. Step 6: Final answer
    x = 490,132.78

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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.