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Finding the Fourth Proportional to 664,438.80, 995,977.80 and 326,960.40

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Solution

The fourth proportional to 664,438.80, 995,977.80 and 326,960.40 is: 490,105.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,438.80 : 995,977.80 = 326,960.40 : x
  2. Step 2: Convert to fraction form
    664,438.80/995,977.80 = 326,960.40/x
  3. Step 3: Cross multiply
    664,438.80x = 995,977.80 × 326,960.40
  4. Step 4: Simplify right side
    664,438.80x = 325,645,299,879.12
  5. Step 5: Solve for x
    x = 325,645,299,879.12/664,438.80
  6. Step 6: Final answer
    x = 490,105.79

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1.5x scale

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.