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Finding the Fourth Proportional to 664,268.80, 995,722.80 and 326,790.40

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Solution

The fourth proportional to 664,268.80, 995,722.80 and 326,790.40 is: 489,850.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,268.80 : 995,722.80 = 326,790.40 : x
  2. Step 2: Convert to fraction form
    664,268.80/995,722.80 = 326,790.40/x
  3. Step 3: Cross multiply
    664,268.80x = 995,722.80 × 326,790.40
  4. Step 4: Simplify right side
    664,268.80x = 325,392,652,101.12
  5. Step 5: Solve for x
    x = 325,392,652,101.12/664,268.80
  6. Step 6: Final answer
    x = 489,850.87

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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.